cmy19760818

【DBA脚本】查看隐含参数

v$parameter动态视图并不能查到Oracle的全部参数，通过v$parameter动态视图我们只能查看到Oracle数据库相关的一些一般普通常用的参数，v$parameter动态视图中并没有包含很多以下划线打头的Oracle核心内部参数，而这些被隐藏的oracle未公开的内部参数，有时对我们实际工作学习中的问题解决有十分重要的作用。

那如何才能查看到这些隐含参数呢，这里提供一个脚本。

这个脚本来自于 secooler 老师技术博客中的一篇文章，《【脚本】隐含参数及注释信息的查询方法》，这里向大师致敬一下。

脚本
col name for a32
col value for a24
col description for a70
select a.ksppinm name,b.ksppstvl value,a.ksppdesc description
from x$ksppi a,x$ksppcv b
where a.inst_id = USERENV ('Instance')
   and b.inst_id = USERENV ('Instance')
   and a.indx = b.indx
   and upper(a.ksppinm) LIKE upper('%¶m%')
order by name
/

-----------------------
例子：（这里我把倒数第二句 and upper(a.ksppinm) LIKE upper('%¶m%') 去掉执行的，这样我们来看一下oracle的全部参数）

SQL> set linesize 8000

SQL> set pagesize 8000

SQL> col name for a32

SQL> col value for a24

SQL> col description for a70

SQL>

SQL> select a.ksppinm name,b.ksppstvl value,a.ksppdesc description

2 from x$ksppi a,x$ksppcv b

3 where a.inst_id = USERENV ('Instance')

4 and b.inst_id = USERENV ('Instance')

5 and a.indx = b.indx

6 order by name;

NAME VALUE DESCRIPTION

-------------------------------- ------------------------ ----------------------------------------------------------------------

O7_DICTIONARY_ACCESSIBILITY FALSE Version 7 Dictionary Accessibility Support

_4031_dump_bitvec 67194879 bitvec to specify dumps prior to 4031 error

_4031_dump_interval 300 Dump 4031 error once for each n-second interval

_4031_max_dumps 100 Maximum number of 4031 dumps for this process

_4031_sga_dump_interval 3600 Dump 4031 SGA heapdump error once for each n-second interval

_4031_sga_max_dumps 10 Maximum number of SGA heapdumps

_NUMA_instance_mapping Not specified Set of nodes that this instance should run on

_NUMA_pool_size Not specified aggregate size in bytes of NUMA pool

_PX_use_large_pool FALSE Use Large Pool as source of PX buffers

__db_cache_size 406847488 Actual size of DEFAULT buffer pool for standard block size buffers

__dg_broker_service_names chic_XPT service names for broker use

__java_pool_size 4194304 Actual size in bytes of java pool

__large_pool_size 4194304 Actual size in bytes of large pool

__shared_pool_size 188743680 Actual size in bytes of shared pool

__streams_pool_size 0 Actual size in bytes of streams pool

_abort_recovery_on_join FALSE if TRUE, abort recovery on join reconfigurations

_accept_versions List of parameters for rolling operation

_active_standby_fast_reconfigura TRUE if TRUE optimize dlm reconfiguration for active/standby OPS

tion

_adaptive_direct_read TRUE Adaptive Direct Read

_adaptive_fetch_enabled TRUE enable/disable adaptive fetch in parallel group by

_add_stale_mv_to_dependency_list TRUE add stale mv to dependency list

_addm_auto_enable TRUE governs whether ADDM gets run automatically after every AWR snapshot

_addm_skiprules comma-separated list of ADDM nodes to skip

_addm_version_check TRUE governs whether ADDM checks the input AWR snapshot version

_adjust_literal_replacement FALSE If TRUE, we will adjust the SQL/PLUS output

_affinity_on TRUE enable/disable affinity at run time

_aiowait_timeouts 100 Number of aiowait timeouts before error is reported

_alert_expiration 604800 seconds before an alert message is moved to exception queue

_alert_message_cleanup 1 Enable Alert Message Cleanup

_alert_message_purge 1 Enable Alert Message Purge

_alert_post_background 1 Enable Background Alert Posting

_all_shared_dblinks treat all dblinks as shared

_allocate_creation_order FALSE should files be examined in creation order during allocation

_allocation_update_interval 3 interval at which successful search in L1 should be updated

_allow_commutativity TRUE allow for commutativity of +, * when comparing expressions

_allow_error_simulation FALSE Allow error simulation for testing

_allow_level_without_connect_by FALSE allow level without connect by

_allow_read_only_corruption FALSE allow read-only open even if database is corrupt

_allow_resetlogs_corruption FALSE allow resetlogs even if it will cause corruption

_allow_terminal_recovery_corrupt FALSE Finish terminal recovery even if it may cause corruption

ion

_alternate_iot_leaf_block_split_ TRUE enable alternate index-organized table leaf-block split-points

points

_always_anti_join CHOOSE always use this method for anti-join when possible

_always_semi_join CHOOSE always use this method for semi-join when possible

_always_star_transformation FALSE always favor use of star transformation

_app_ctx_vers FALSE enable app ctx versioning

_aq_tm_scanlimit 0 scan limit for Time Managers to clean up IOT

_arch_io_slaves 0 ARCH I/O slaves

_array_update_vector_read_enable FALSE Enable array update vector read

_ash_disk_filter_ratio 10 Ratio of the number of in-memory samples to the number of samples actu

ally written to disk

_ash_disk_write_enable TRUE To enable or disable Active Session History flushing

_ash_dummy_test_param 0 Oracle internal dummy ASH parameter used ONLY for testing!

_ash_eflush_trigger 66 The percentage above which if the in-memory ASH is full the emergency

flusher will be triggered

_ash_enable TRUE To enable or disable Active Session sampling and flushing

_ash_sample_all FALSE To enable or disable sampling every connected session including ones w

aiting for idle waits

_ash_sampling_interval 1000 Time interval between two successive Active Session samples in millise

_ash_size 1048618 To set the size of the in-memory Active Session History buffers

_asm_acd_chunks 1 initial ACD chunks created

_asm_allow_only_raw_disks TRUE Discovery only raw devices

_asm_allow_resilver_corruption FALSE Enable disk resilvering for external redundancy

_asm_ausize 1048576 allocation unit size

_asm_blksize 4096 metadata block size

_asm_disk_repair_time 14400 seconds to wait before dropping a failing disk

_asm_droptimeout 60 timeout before offlined disks get dropped (in 3s ticks)

_asm_emulmax 10000 max number of concurrent disks to emulate I/O errors

_asm_emultimeout 0 timeout before emulation begins (in 3s ticks)

_asm_kfdpevent 0 KFDP event

_asm_libraries ufs library search order for discovery

_asm_maxio 1048576 Maximum size of individual I/O request

_asm_stripesize 131072 ASM file stripe size

_asm_stripewidth 8 ASM file stripe width

_asm_wait_time 18 Max/imum time to wait before asmb exits

_asmlib_test 0 Osmlib test event

_asmsid asm ASM instance id

_assm_default TRUE ASSM default

_async_recovery_claims TRUE if TRUE, issue recovery claims asynchronously

_async_recovery_reads TRUE if TRUE, issue recovery reads asynchronously

_avoid_prepare TRUE if TRUE, do not prepare a buffer when the master is local

_awr_corrupt_mode FALSE AWR Corrupt Mode

_awr_disabled_flush_tables Disable flushing of specified AWR tables

_awr_flush_threshold_metrics FALSE Enable/Disable Flushing AWR Workload Metrics

_awr_flush_workload_metrics FALSE Enable/Disable Flushing AWR Workload Metrics

_awr_mmon_cpuusage TRUE Enable/disable AWR MMON CPU Usage Tracking

_awr_restrict_mode FALSE AWR Restrict Mode

_awr_sql_child_limit 200 Setting for AWR SQL Child Limit

_b_tree_bitmap_plans TRUE enable the use of bitmap plans for tables w. only B-tree indexes

_backup_disk_io_slaves 0 BACKUP Disk I/O slaves

_backup_io_pool_size 1048576 memory to reserve from the large pool

_backup_kgc_bufsz 0 specifies buffer size to be used for kgc compression

_backup_kgc_niters 0 specifies number of iterations used for kgc compression

_backup_kgc_type 0 specifies compression type used for kgc compression

_backup_ksfq_bufcnt 0 number of the ksfq buffers used for backup/restore

_backup_ksfq_bufsz 0 size of the ksfq buffer used for backup/restore

_backup_max_gap_size 4294967294 largest gap in an incremental/optimized backup buffer, in bytes

_bct_bitmaps_per_file 8 number of bitmaps to store for each datafile

_bct_buffer_allocation_max 104857600 maximum size of all change tracking buffer allocations, in bytes

_bct_buffer_allocation_min_exten 1 mininum number of extents to allocate per buffer allocation

_bct_buffer_allocation_size 2097152 size of one change tracking buffer allocation, in bytes

_bct_chunk_size 0 change tracking datafile chunk size, in bytes

_bct_crash_reserve_size 262144 change tracking reserved crash recovery SGA space, in bytes

_bct_file_block_size 0 block size of change tracking file, in bytes

_bct_file_extent_size 0 extent size of change tracking file, in bytes

_bct_fixtab_file change tracking file for fixed tables

_bct_initial_private_dba_buffer_ 0 initial number of entries in the private change tracking dba buffers

size

_bct_public_dba_buffer_size 0 total size of all public change tracking dba buffers, in bytes

_bitmap_or_improvement_enabled TRUE controls extensions to partition pruning for general predicates

_block_change_tracking TRUE change tracking possible

_blocks_per_cache_server 128 number of consecutive blocks per global cache server

_bloom_filter_debug 0 debug level for bloom filtering

_bloom_filter_enabled TRUE enables or disables bloom filter

_bt_mmv_query_rewrite_enabled TRUE allow rewrites with multiple MVs and base tables

_buffer_busy_wait_timeout 100 buffer busy wait time in centiseconds

_bufq_flow_control_thrsh 0 flow control threshold value

_bufq_max_msg_sz 0 maximum size of the message allowed in memory

_bufq_stop_flow_control FALSE Stop enforcing flow control for buffered queues

_build_deferred_mv_skipping_mvlo FALSE DEFERRED MV creation skipping MV log setup update

g_update

_bump_highwater_mark_count 0 how many blocks should we allocate per free list on advancing HWM

_bwr_for_flushed_pi TRUE if TRUE, generate a BWR for a flushed PI

_cache_stats_monitor FALSE if TRUE, enable cache stats monitoring

_cgs_reconfig_timeout 120 CGS reconfiguration timeout interval

_cgs_send_timeout 300 CGS send timeout value

_check_block_after_checksum TRUE perform. block check after checksum if both are turned on

_check_ts_threshold 0 check tablespace thresholds

_cleanup_rollback_entries 100 no. of undo entries to apply per transaction cleanup

_close_cached_open_cursors FALSE close cursors cached by PL/SQL at each commit

_cluster_library clss cluster library selection

_collapse_wait_history FALSE collapse wait history

_collect_undo_stats TRUE Collect Statistics v$undostat

_column_compression_factor 0 Column compression ratio

_column_elimination_off FALSE turn off predicate-only column elimination

_column_tracking_level 1 column usage tracking

_compilation_call_heap_extent_si 16384 Size of the compilation call heaps extents

_complex_view_merging TRUE enable complex view merging

_controlfile_block_size 0 control file block size in bytes

_controlfile_enqueue_dump FALSE dump the system states after controlfile enqueue timeout

_controlfile_enqueue_timeout 900 control file enqueue timeout in seconds

_controlfile_section_init_size control file initial section size

_controlfile_section_max_expand control file max expansion rate

_controlfile_update_check OFF controlfile update sanity check

_convert_set_to_join FALSE enables conversion of set operator to join

_coord_message_buffer 0 parallel recovery coordinator side extra message buffer size

_corrupted_rollback_segments corrupted undo segment list

_cost_equality_semi_join TRUE enables costing of equality semi-join

_cpu_to_io 0 divisor for converting CPU cost to I/O cost

_cr_grant_global_role TRUE if TRUE, grant lock for CR requests when block is in global role

_cr_grant_local_role AUTO turn 3-way CR grants off, make it automatic, or turn it on

_cr_server_log_flush TRUE if TRUE, flush redo log before serving a CR buffer

_ctas_hwm_brokered_loads TRUE Enable HWM brokered CTAS

_cursor_bind_capture_area_size 400 maximum size of the cursor bind capture area

_cursor_bind_capture_interval 900 interval (in seconds) between two bind capture for a cursor

_cursor_cache_frame_bind_memory FALSE frame. & bind buffer caching

_cursor_db_buffers_pinned 320 additional number of buffers a cursor can pin at once

_cursor_plan_enabled TRUE enable collection and display of cursor plans

_cursor_plan_hash_version 1 version of cursor plan hash value

_cursor_plan_unparse_enabled TRUE enables/disables using unparse to build projection/predicates

_cursor_stats_bucket 15 Hash table buckets for cursor stats (2^).

_cursor_stats_heap 4 Heaps/latches for cursor stats.

_db_aging_cool_count 1 Touch count set when buffer cooled

_db_aging_freeze_cr FALSE Make CR buffers always be too cold to keep in cache

_db_aging_hot_criteria 2 Touch count which sends a buffer to head of replacement list

_db_aging_stay_count 0 Touch count set when buffer moved to head of replacement list

_db_aging_touch_time 3 Touch count which sends a buffer to head of replacement list

_db_always_check_system_ts TRUE Always perform. block check and checksum for System tablespace

_db_block_adjcheck TRUE adjacent cache buffer checks - low blkchk overwrite parameter

_db_block_adjchk_level 79397888 adjacent cache buffer check level

_db_block_align_direct_read TRUE Align Direct Reads

_db_block_buffers 48403 Number of database blocks cached in memory: hidden parameter

_db_block_cache_clone FALSE Always clone data blocks on get (for debugging)

_db_block_cache_history 0 buffer header tracing (non-zero only when debugging)

_db_block_cache_history_level 2 buffer header tracing level

_db_block_cache_num_umap 0 number of unmapped buffers (for tracking swap calls on blocks)

_db_block_cache_protect FALSE protect database blocks (true only when debugging)

_db_block_cache_protect_internal 0 protect database blocks (for strictly internal use only)

_db_block_check_for_debug FALSE Check more and dump block before image for debugging

_db_block_check_objtyp TRUE check objd and typ on cache disk read

_db_block_do_full_mbreads FALSE do full block read even if some blocks are in cache

_db_block_hash_buckets 131072 Number of database block hash buckets

_db_block_hash_latches 1024 Number of database block hash latches

_db_block_hi_priority_batch_size 0 Fraction of writes for high priority reasons

_db_block_known_clean_pct 2 Initial Percentage of buffers to maintain known clean

_db_block_lru_latches 8 number of lru latches

_db_block_max_cr_dba 6 Maximum Allowed Number of CR buffers per dba

_db_block_max_scan_pct 40 Percentage of buffers to inspect when looking for free

_db_block_med_priority_batch_siz 0 Fraction of writes for medium priority reasons

_db_block_numa 1 Number of NUMA nodes

_db_block_prefetch_limit 0 Prefetch limit in blocks

_db_block_prefetch_quota 10 Prefetch quota as a percent of cache size

_db_block_table_scan_buffer_size 4194304 Size of shared table scan read buffer

_db_block_temp_redo FALSE generate redo for temp blocks

_db_block_trace_protect FALSE trace buffer protect calls

_db_cache_advice_batch_size 128 cache advisory simulation batch size

_db_cache_advice_sample_factor 4 cache advisory sampling factor

_db_cache_crx_check FALSE check for costly crx examination functions

_db_cache_pre_warm TRUE Buffer Cache Pre-Warm Enabled : hidden parameter

_db_cache_process_cr_pin_max maximum number of cr pins a process may have

_db_change_notification_enable TRUE enable db change notification

_db_fast_obj_check FALSE enable fast object drop sanity check

_db_fast_obj_ckpt TRUE enable fast object checkpoint

_db_fast_obj_truncate TRUE enable fast object truncate

_db_file_direct_io_count 1048576 Sequential I/O buf size

_db_file_exec_read_count 16 multiblock read count for regular clients

_db_file_format_io_buffers 4 Block formatting I/O buf count

_db_file_noncontig_mblock_read_c 11 number of noncontiguous db blocks to be prefetched

ount

_db_file_optimizer_read_count 16 multiblock read count for regular clients

_db_handles 750 System-wide simultaneous buffer operations

_db_handles_cached 5 Buffer handles cached each process

_db_hot_block_tracking FALSE track hot blocks for hash latch contention

_db_index_block_checking TRUE index block checking override parameter

_db_large_dirty_queue 25 Number of buffers which force dirty queue to be written

_db_lost_write_checking FALSE Enable scn based lost write detection mechanism

_db_mttr_advice ON MTTR advisory

_db_mttr_partitions 0 number of partitions for MTTR advisory

_db_mttr_sample_factor 64 MTTR simulation sampling factor

_db_mttr_sim_target MTTR simulation targets

_db_mttr_sim_trace_size 256 MTTR simulation trace size

_db_mttr_trace_to_alert FALSE dump trace entries to alert file

_db_obj_ckpt_ordered FALSE fast object checkpoint ordered by lrba

_db_obj_enable_ksr TRUE enable ksr in object checkpoint/reuse

_db_percent_hot_default 50 Percent of default buffer pool considered hot

_db_percent_hot_keep 0 Percent of keep buffer pool considered hot

_db_percent_hot_recycle 0 Percent of recycle buffer pool considered hot

_db_percpu_create_cachesize 2 size of cache created per cpu in deferred cache create

_db_recovery_temporal_file_dest default database recovery temporal file location

_db_row_overlap_checking TRUE row overlap checking override parameter for data/index blocks

_db_todefer_cache_create TRUE buffer cache deferred create

_db_writer_chunk_writes 0 Number of writes DBWR should wait for

_db_writer_coalesce_area_size 1048576 Size of memory allocated to dbwriter for coalescing writes

_db_writer_coalesce_write_limit 131072 Limit on size of coalesced write

_db_writer_flush_imu TRUE If FALSE, DBWR will not downgrade IMU txns for AGING

_db_writer_histogram_statistics FALSE maintain dbwr histogram statistics in x$kcbbhs

_db_writer_max_writes 0 Max number of outstanding DB Writer IOs

_db_writer_verify_writes FALSE Enable lost write detection mechanism

_dbg_proc_startup FALSE debug process startup

_dbwr_async_io TRUE Enable dbwriter asynchronous writes

_dbwr_scan_interval 300 dbwriter scan interval

_dbwr_tracing 0 Enable dbwriter tracing

_dead_process_scan_interval 10 PMON dead process scan interval

_debug_enable FALSE wait for debug

_dedicated_server_poll_count 10 dedicated server poll count

_dedicated_server_post_wait FALSE dedicated server post/wait

_dedicated_server_post_wait_call FALSE dedicated server post/wait call

_default_encrypt_alg 0 default encryption algorithm

_default_non_equality_sel_check TRUE sanity check on default selectivity for like/range predicate

_delay_index_maintain TRUE delays index maintenance until after MV is refreshed

_diag_daemon TRUE start DIAG daemon

_diag_diagnostics TRUE Turn off diag diagnostics

_dimension_skip_null TRUE control dimension skip when null feature

_disable_adaptive_shrunk_aggrega FALSE adaptive shrunk aggregation

tion

_disable_datalayer_sampling FALSE disable datalayer sampling

_disable_duplex_link FALSE Turn off connection duplexing

_disable_fast_aggregation FALSE fast aggregation

_disable_file_locks FALSE disable file locks for control, data, redo log files

_disable_function_based_index FALSE disable function-based index matching

_disable_health_check FALSE Disable Health Check

_disable_image_check FALSE Disable Oracle executable image checking

_disable_incremental_checkpoints FALSE Disable incremental checkpoints for thread recovery

_disable_incremental_recovery_ck FALSE Disable incremental recovery checkpoint mechanism

_disable_instance_params_check FALSE disable instance type check for ksp

_disable_interface_checking FALSE disable interface checking at startup

_disable_kcbhxor_osd FALSE disable kcbh(c)xor OSD functionality

_disable_latch_free_SCN_writes_v FALSE disable latch-free SCN writes using 32-bit compare & swap

ia_32cas

_disable_latch_free_SCN_writes_v FALSE disable latch-free SCN writes using 64-bit compare & swap

ia_64cas

_disable_logging FALSE Disable logging

_disable_multiple_block_sizes FALSE disable multiple block size support (for debugging)

_disable_ntlog_events FALSE Disable logging to NT event log

_disable_odm FALSE disable odm feature

_disable_recoverable_recovery FALSE Disable the new recoverable recovery mechanism

_disable_recovery_read_skip FALSE Disable the read optimization during media recovery

_disable_sample_io_optim FALSE disable row sampling IO optimization

_disable_savepoint_reset FALSE disable the fix for bug 1402161

_disable_selftune_checkpointing FALSE Disable self-tune checkpointing

_disable_streams_pool_auto_tunin FALSE disable streams pool auto tuning

_disable_system_state 4294967294 disable system state dump

_disable_txn_alert 0 disable txn layer alert

_discrete_transactions_enabled FALSE enable OLTP mode

_dispatcher_rate_scale scale to display rate statistic (100ths of a second)

_dispatcher_rate_ttl time-to-live for rate statistic (100ths of a second)

_distinct_view_unnesting FALSE enables unnesting of in subquery into distinct view

_distributed_recovery_connection 200 number of seconds RECO holds outbound connections open

_hold_time

_dlm_send_timeout 30000 DLM send timeout value

_dlmtrace Trace string of global enqueue type(s)

_dm_max_shared_pool_pct 1 max percentage of the shared pool to use for a mining model

_dml_monitoring_enabled TRUE enable modification monitoring

_domain_index_batch_size 2000 maximum number of rows from one call to domain index fetch routine

_domain_index_dml_batch_size 200 maximum number of rows for one call to domain index dml routines

_drop_table_granule 256 drop_table_granule

_drop_table_optimization_enabled TRUE reduce SGA memory use during drop of a partitioned table

_ds_iocount_iosize 6553664 Dynamic Sampling Service defaults: #IOs and IO Size

_dss_cache_flush FALSE enable full cache flush for parallel execution

_dtree_area_size 131072 size of Decision Tree Classification work area

_dtree_binning_enabled TRUE Decision Tree Binning Enabled

_dtree_bintest_id 0 Decision Tree Binning Test ID

_dtree_compressbmp_enabled TRUE Decision Tree Using Compressed Bitmaps Enabled

_dtree_max_surrogates 1 maximum number of surrogates

_dtree_pruning_enabled TRUE Decision Tree Pruning Enabled

_dummy_instance FALSE dummy instance started by RMAN

_dump_common_subexpressions FALSE dump common subexpressions

_dump_connect_by_loop_data FALSE dump connect by loop error message into trc file

_dump_cursor_heap_sizes FALSE dump comp/exec heap sizes to tryace file

_dump_interval_limit 120 trace dump time interval limit (in seconds)

_dump_max_limit 5 max number of dump within dump interval

_dump_qbc_tree 0 dump top level query parse tree to trace

_dump_rcvr_ipc TRUE if TRUE enables IPC dump at instance eviction time

_dump_system_state_scope local scope of sysstate dump during instance termination

_dump_trace_scope global scope of trace dump during a process crash

_dynamic_rls_policies TRUE rls policies are dynamic

_dynamic_stats_threshold 30 delay threshold (in seconds) between sending statistics messages

_eliminate_common_subexpr TRUE enables elimination of common sub-expressions

_enable_NUMA_optimization TRUE Enable NUMA specific optimizations

_enable_block_level_transaction_ TRUE enable block level recovery

recovery

_enable_cscn_caching FALSE enable commit SCN caching for all transactions

_enable_default_affinity 0 to enable default implementation of affinity osds

_enable_dml_lock_escalation TRUE enable dml lock escalation against partitioned tables if TRUE

_enable_exchange_validation_usin TRUE use check constraints on the table for validation

g_check

_enable_fast_ref_after_mv_tbs FALSE enable fast refresh after move tablespace

_enable_hash_overflow FALSE TRUE - enable hash cluster overflow based on SIZE

_enable_hwm_sync TRUE enable HWM synchronization

_enable_kgh_policy FALSE temporary to disable/enable kgh policy

_enable_list_io FALSE Enable List I/O

_enable_nativenet_tcpip FALSE Enable skgxp driver usage for native net

_enable_refresh_schedule TRUE enable or disable MV refresh scheduling (revert to 9.2 behavior)

_enable_reliable_latch_waits TRUE Enable reliable latch waits

_enable_rlb TRUE enable RLB metrics processing

_enable_tablespace_alerts TRUE enable tablespace alerts

_enable_type_dep_selectivity TRUE enable type dependent selectivity estimates

_enqueue_debug_multi_instance FALSE debug enqueue multi instance

_enqueue_hash 375 enqueue hash table length

_enqueue_hash_chain_latches 2 enqueue hash chain latches

_enqueue_locks 2300 locks for managed enqueues

_enqueue_resources 968 resources for enqueues

_expand_aggregates TRUE expand aggregates

_explain_rewrite_mode FALSE allow additional messages to be generated during explain rewrite

_extended_pruning_enabled TRUE do runtime pruning in iterator if set to TRUE

_fair_remote_cvt FALSE if TRUE enables fair remote convert

_fairness_threshold 4 number of times to CR serve before downgrading lock

_fast_dual_enabled TRUE enable/disable fast dual

_fast_full_scan_enabled TRUE enable/disable index fast full scan

_fast_start_instance_recovery_ta 0 cluster availability target time in RAC environment

rget

_fic_algorithm_set automatic Set Frequent Itemset Counting Algorithm

_fic_area_size 131072 size of Frequent Itemset Counting work area

_fic_max_length 20 Frequent Itemset Counting Maximum Itemset Length

_fic_min_bmsize 1024 Frequent Itemset Counting Minimum BITMAP Size

_fic_outofmem_candidates FALSE Frequent Itemset Counting Out Of Memory Candidates Generation

_fifth_spare_parameter fifth spare parameter - string

_filemap_dir FILEMAP directory

_first_spare_parameter first spare parameter - integer

_flashback_allow_noarchivelog FALSE Allow enabling flashback on noarchivelog database

_flashback_barrier_interval 1800 Flashback barrier interval in seconds

_flashback_copy_latches 10 Number of flashback copy latches

_flashback_fuzzy_barrier TRUE Use flashback fuzzy barrier

_flashback_generation_buffer_siz 8388608 flashback generation buffer size

_flashback_hint_barrier_percent 20 Flashback hint barrier percent

_flashback_log_io_error_behavior. 0 Specify Flashback log I/O error behavior

_flashback_log_min_size 100 Minimum flashback log size

_flashback_log_size 1000 Flashback log size

_flashback_logfile_enqueue_timeo 600 flashback logfile enqueue timeout for opens

_flashback_max_log_size 0 Maximum flashback log size in bytes (OS limit)

_flashback_max_n_log_per_thread 2048 Maximum number of flashback logs per flashback thread

_flashback_n_log_per_thread 128 Desired number of flashback logs per flashback thread

_flashback_standby_barrier_inter 1800 Flashback standby barrier interval in seconds

val

_flashback_verbose_info FALSE Print verbose information about flashback database

_flashback_write_size_qm 4 Desired flashback write size in quarter MB

_force_datefold_trunc FALSE force use of trunc for datefolding rewrite

_force_rewrite_enable FALSE control new query rewrite features

_force_temptables_for_gsets FALSE executes concatenation of rollups using temp tables

_fourth_spare_parameter fourth spare parameter - string

_full_pwise_join_enabled TRUE enable full partition-wise join when TRUE

_gby_hash_aggregation_enabled TRUE enable group-by and aggregation using hash scheme

_gby_onekey_enabled TRUE enable use of one comparison of all group by keys

_gc_affinity_limit 50 dynamic affinity limit

_gc_affinity_minimum 1200 dynamic affinity minimum activity per minute

_gc_affinity_time 10 if non zero, enable dynamic object affinity

_gc_check_bscn TRUE if TRUE, check for stale blocks

_gc_coalesce_recovery_reads TRUE if TRUE, coalesce recovery reads

_gc_defer_time 3 how long to defer down converts for hot buffers

_gc_dynamic_affinity_locks TRUE if TRUE, get dynamic affinity locks

_gc_element_percent 103 global cache element percent

_gc_global_lru AUTO turn global lru off, make it automatic, or turn it on

_gc_integrity_checks 1 set the integrity check level

_gc_keep_recovery_buffers TRUE if TRUE, make recovery buffers current

_gc_latches 8 number of latches per LMS process

_gc_maximum_bids 0 maximum number of bids which can be prepared

_gc_statistics TRUE if TRUE, kcl statistics are maintained

_gc_undo_affinity TRUE if TRUE, enable dynamic undo affinity

_gc_undo_affinity_locks TRUE if TRUE, get affinity locks for undo

_gc_use_cr TRUE if TRUE, allow CR pins on PI and WRITING buffers

_gc_vector_read TRUE if TRUE, vector read current buffers

_gcs_fast_reconfig TRUE if TRUE, enable fast reconfiguration for gcs locks

_gcs_latches 0 number of gcs resource hash latches to be allocated per LMS process

_gcs_process_in_recovery TRUE if TRUE, process gcs requests during instance recovery

_gcs_resources number of gcs resources to be allocated

_gcs_shadow_locks number of pcm shadow locks to be allocated

_generalized_pruning_enabled TRUE controls extensions to partition pruning for general predicates

_ges_dd_debug TRUE if TRUE enables GES deadlock detection debug diagnostics

_ges_diagnostics TRUE if TRUE enables GES diagnostics

_ges_health_check 1 if greater than 0 enables GES system health check

_groupby_nopushdown_cut_ratio 3 groupby nopushdown cut ratio

_groupby_orderby_combine 5000 groupby/orderby don't combine threshold

_gs_anti_semi_join_allowed TRUE enable anti/semi join for the GS query

_hang_analysis_num_call_stacks 3 hang analysis num call stacks

_hang_detection 0 Hang Management detection interval

_hard_protection FALSE if TRUE enable H.A.R.D specific format changes

_hash_join_enabled TRUE enable/disable hash join

_hash_multiblock_io_count 0 number of blocks hash join will read/write at once

_high_server_threshold 0 high server thresholds

_hj_bit_filter_threshold 50 hash-join bit filtering threshold (0 always enabled)

_hwm_sync_threshold 10 HWM synchronization threshold in percentage

_idl_conventional_index_maintena TRUE enable conventional index maintenance for insert direct load

nce

_idxrb_rowincr 100000000 proportionality constant for dop vs. rows in index rebuild

_ignore_desc_in_index FALSE ignore DESC in indexes, sort those columns ascending anyhow

_immediate_commit_propagation TRUE if TRUE, propagate commit SCN immediately

_improved_outerjoin_card TRUE improved outer-join cardinality calculation

_improved_row_length_enabled TRUE enable the improvements for computing the average row length

_imr_active TRUE Activate Instance Membership Recovery feature

_imr_disk_voting_interval 3 Maximum wait for IMR disk voting (seconds)

_imr_max_reconfig_delay 300 Maximum Reconfiguration delay (seconds)

_imr_splitbrain_res_wait 600 Maximum wait for split-brain resolution (seconds)

_imu_pools 3 in memory undo pools

_in_memory_undo TRUE Make in memory undo for top level transactions

_incremental_recovery_ckpt_min_b 30 Minimum number of writes for incremental recovery ckpt every 3 sec

atch

_index_join_enabled TRUE enable the use of index joins

_index_prefetch_factor 100 index prefetching factor

_init_granule_interval 10 number of granules to process for deferred cache

_init_sql_file %ORACLE_HOME%\RDBMS\ADMI File containing SQL statements to execute upon database creation

N\SQL.BSQ

_inject_startup_fault 0 inject fault in the startup code

_insert_enable_hwm_brokered TRUE during parallel inserts high water marks are brokered

_inst_locking_period 5 period an instance can retain a newly acquired level1 bitmap

_interconnect_checksum TRUE if TRUE, checksum interconnect blocks

_intrapart_pdml_enabled TRUE Enable intra-partition updates/deletes

_intrapart_pdml_randomlocal_enab TRUE Enable intra-partition updates/deletes with random local dist

led

_io_shared_pool_size 4194304 Size of I/O buffer pool from SGA

_io_slaves_disabled FALSE Do not use I/O slaves

_ior_serialize_fault 0 inject fault in the ior serialize code

_ioslave_batch_count 1 Per attempt IOs picked

_ioslave_issue_count 500 IOs issued before completion check

_job_queue_interval 5 Wakeup interval in seconds for job queue co-ordinator

_kcl_commit TRUE if TRUE, call kjbcommit

_kcl_conservative_log_flush FALSE if TRUE, conservatively log flush before CR serving

_kcl_debug TRUE if TRUE, record le history

_kcl_index_split TRUE if TRUE, reject pings on blocks in middle of a split

_kcl_undo_grouping 32 grouping for undo block locks

_kcl_undo_locks 128 number of locks per undo segment

_kdbl_enable_post_allocation FALSE allocate dbas after populating data buffers

_keep_remote_column_size FALSE remote column size does not get modified

_kernel_message_network_driver FALSE kernel message network driver

_kffmap_hash_size 1024 size of kffmap_hash table

_kffmop_hash_size 2048 size of kffmop_hash table

_kghdsidx_count 1 max kghdsidx count

_kgl_bucket_count 9 index to the bucket count array

_kgl_fixed_extents TRUE fixed extent size for library cache memory allocations

_kgl_hash_collision FALSE whether KGL hash collision is possible

_kgl_heap_size 1024 extent size for library cache heap 0

_kgl_keep_cache_pct 30 KGL keep cache minimum threshold

_kgl_keep_cache_retain_pct 20 KGL keep cache retain threshold

_kgl_large_heap_warning_threshol 2097152 maximum heap size before KGL writes warnings to the alert log

_kgl_latch_count 0 number of library cache latches

_kgl_multi_instance_invalidation TRUE whether KGL to support multi-instance invalidations

_kgl_multi_instance_lock TRUE whether KGL to support multi-instance locks

_kgl_multi_instance_pin TRUE whether KGL to support multi-instance pins

_kgl_session_cached_objects 10 maximum length of the KGL object cache lru

_kgl_time_to_wait_for_locks 15 time to wait for locks and pins before timing out

_kglsim_maxmem_percent 5 max percentage of shared pool size to be used for KGL advice

_kgx_latches 512 # of mutex latches if CAS is not supported.

_kill_java_threads_on_eoc FALSE Kill Java threads and do sessionspace migration at end of call

_kkfi_trace FALSE trace expression substitution

_kks_use_mutex_pin FALSE Turning on this will make KKS use mutex for cursor pins.

_kolfuseslf FALSE allow kolf to use slffopen

_kql_subheap_trace 0 tracing level for library cache subheap level pins

_ksd_test_param 999 KSD test parmeter

_ksdxdocmd_default_timeout_ms 30000 default timeout for internal oradebug commands

_ksdxw_cini_flg 0 ksdxw context initialization flag

_ksdxw_nbufs 1000 ksdxw number of buffers in buffered mode

_ksdxw_num_pgw 10 number of watchpoints on a per-process basis

_ksdxw_num_sgw 10 number of watchpoints to be shared by all processes

_ksdxw_stack_depth 4 number of PCs to collect in the stack when watchpoint is hit

_kse_die_timeout 60000 amount of time a dying process is spared by PMON (in centi-secs)

_kse_pc_table_size 256 kse pc table cache size

_ksfd_verify_write FALSE verify asynchronous writes issued through ksfd

_ksi_trace KSI trace string of lock type(s)

_ksmg_granule_locking_status 1 granule locking status

_ksmg_granule_size 4194304 granule size in bytes

_ksmg_lock_check_interval timeout action interval in minutes

_ksmg_lock_reacquire_count 5 repeat count for acquisition of locks

_ksu_diag_kill_time 5 number of seconds ksuitm waits before killing diag

_ksuitm_dont_kill_dumper FALSE delay inst. termination to allow processes to dump

_ksxp_diagmode OFF set to OFF to disable automatic slowsend diagnostics

_ksxp_reporting_process LMD0 reporting process for KSXP

_ksxp_send_timeout 300 set timeout for sends queued with the inter-instance IPC

_ktc_debug 0 for ktc debug

_ktc_latches 0 number of ktc latches

_ktu_latches 0 number of KTU latches

_ku_trace none datapump trace parameter

_large_pool_min_alloc 16000 minimum allocation size in bytes for the large allocation pool

_last_allocation_period 5 period over which an instance can retain an active level1 bitmap

_latch_class_0 latch class 0

_latch_class_1 latch class 1

_latch_class_2 latch class 2

_latch_class_3 latch class 3

_latch_class_4 latch class 4

_latch_class_5 latch class 5

_latch_class_6 latch class 6

_latch_class_7 latch class 7

_latch_classes latch classes override

_latch_miss_stat_sid 0 Sid of process for which to collect latch stats

_latch_recovery_alignment 998 align latch recovery structures

_ldr_io_size 262144 size of write IOs used during a load operation

_left_nested_loops_random TRUE enable random distribution method for left of nestedloops

_lgwr_async_broadcasts TRUE LGWR Asynchronous Broadcasts enabling boolean flag

_lgwr_async_io FALSE LGWR Asynchronous IO enabling boolean flag

_lgwr_delay_write FALSE LGWR write delay for debugging

_lgwr_io_slaves 0 LGWR I/O slaves

_lgwr_max_ns_wt 1 Maximum wait time for lgwr to allow NetServer to progress

_lgwr_ns_nl_max 1000 Variable to simulate network latency or buffer threshold

_lgwr_ns_nl_min 500 Variable to simulate network latency or buffer threshold

_lgwr_ns_sim_err 0 Variable to simulate errors lgwrns

_lgwr_ta_sim_err 0 Variable to simulate errors lgwr true async

_library_cache_advice TRUE whether KGL advice should be turned on

_lightweight_hdrs TRUE Lightweight headers for redo

_like_with_bind_as_equality FALSE treat LIKE predicate with bind as an equality predicate

_lm_activate_lms_threshold 100 threshold value to activate an additional lms

_lm_cache_lvl0_cleanup 0 how often to cleanup level 0 cache res (in sec)

_lm_cache_res_cleanup 25 percentage of cached resources should be cleanup

_lm_cache_res_type TMHWDI cache resource: string of lock types(s)

_lm_checksum_batch_msg FALSE GES checksum batch messages

_lm_contiguous_res_count 128 number of contiguous blocks that will hash to the same HV bucket

_lm_dd_interval 60 dd time interval in seconds

_lm_dd_scan_interval 5 dd scan interval in seconds

_lm_drm_max_requests 100 dynamic remastering maximum affinity requests processed together

_lm_drm_window 0 dynamic remastering bucket window size

_lm_drm_xlatch 0 dynamic remastering forced exclusive latches

_lm_dynamic_lms FALSE dynamic lms invocation

_lm_dynamic_load TRUE dynamic load adjustment

_lm_dynamic_remastering FALSE if TRUE enables dynamic remastering

_lm_enq_lock_freelist Number of ges enqueue element freelist

_lm_enq_rcfg TRUE if TRUE enables enqueue reconfiguration

_lm_enqueue_freelist 3 Number of enqueue freelist

_lm_file_affinity mapping between file id and master instance number

_lm_global_posts TRUE if TRUE deliver global posts to remote nodes

_lm_lmd_waittime 8 default wait time for lmd in centiseconds

_lm_lms 0 number of background gcs server processes to start

_lm_lms_waittime 8 default wait time for lms in centiseconds

_lm_locks 12000 number of enqueues configured for cluster database

_lm_master_weight 1 master resource weight for this instance

_lm_max_lms 0 max. number of background global cache server processes

_lm_min_lms 0 min. number of background global cache server processes

_lm_msg_batch_size 0 GES batch message size

_lm_msg_cache_thresholds GES message buffer caching threshold

_lm_msg_cleanup_interval 3000 GES message buffer cleanup interval time

_lm_node_join_opt FALSE cluster database node join optimization in reconfig

_lm_non_fault_tolerant FALSE disable cluster database fault-tolerance mode

_lm_num_pcmhv_latches 0 number of latches covering the PCM HV buckets in cgs

_lm_num_pt_buckets 4096 number of buckets in the object affinity hash table

_lm_num_pt_latches 128 number of latches in the object affinity hash table

_lm_proc_freeze_timeout 300 reconfiguration: process freeze timeout

_lm_process_batching TRUE GES implicit process batching for IPC messages

_lm_procs 320 number of client processes configured for cluster database

_lm_rcfg_timeout 180000 Reconfiguration timeout

_lm_rcv_buffer_size 32768 the size of receive buffer

_lm_res_hash_bucket 0 number of resource hash buckets

_lm_res_part 128 number of resource partition configured for gcs

_lm_ress 6000 number of resources configured for cluster database

_lm_send_buffers 10000 number of cluster database send buffers

_lm_send_mode auto GES send mode

_lm_send_queue_batching TRUE GES send queue message batching

_lm_send_queue_length 5000 GES send queue maximum length

_lm_sendproxy_reserve 25 GES percentage of send proxy reserve of send tickets

_lm_share_lock_opt FALSE if TRUE enables share lock optimization

_lm_sq_batch_factor 2 GES send queue minimum batching factor

_lm_sq_batch_type auto GES send queue batching mechanism

_lm_sq_batch_waittick 3 GES send queue batching waittime in tick

_lm_sync_timeout Synchronization timeout for DLM reconfiguration steps

_lm_ticket_active_sendback Flow control ticket active sendback threshold

_lm_tickets 1000 GES messaging tickets

_lm_tx_delta 16 TX lock localization delta

_lm_validate_resource_type FALSE if TRUE enables resource name validation

_lm_xids 352 number of transaction IDs configured for cluster database

_load_without_compile none Load PL/SQL or Database objects without compilation

_local_communication_costing_ena TRUE enable local communication costing when TRUE

bled

_local_communication_ratio 50 set the ratio between global and local communication (0..100)

_lock_sga_areas 0 Lock specified areas of the SGA in physical memory

_log_archive_avoid_memcpy TRUE log archive avoid memcpy

_log_archive_buffer_size 2048 Size of each archival buffer in log file blocks

_log_archive_buffers 4 Number of buffers to allocate for archiving

_log_archive_callout archival callout

_log_archive_compress_enable FALSE Bypass database rules for enabling archivelog compression

_log_archive_delta_sync_wait 0 iterative sleep time in centiseconds seconds when SYNC=PARALLEL

_log_archive_net_timeout 0 maximum network wait time in seconds when SYNC=PARALLEL

_log_archive_network_redo_size 10 Log archive network redo buffer size used by ARCH

_log_archive_prot_auto_demote FALSE log archive protection auto demotion

_log_archive_security_enabled TRUE log archive security enabled

_log_blocks_during_backup TRUE log block images when changed during backup

_log_buffers_corrupt FALSE corrupt redo buffers before write

_log_buffers_debug FALSE debug redo buffers (slows things down)

_log_checkpoint_recovery_check 0 # redo blocks to verify after checkpoint

_log_committime_block_cleanout FALSE Log commit-time block cleanout

_log_debug_multi_instance FALSE debug redo multi instance code

_log_deletion_policy mandatory archivelog deletion policy for mandatory/all destination

_log_io_size 0 automatically initiate log write if this many redo blocks in buffer

_log_parallelism 1 Number of log buffer strands

_log_parallelism_dynamic TRUE Enable dynamic strands

_log_parallelism_max 2 Maximum number of log buffer strands

_log_private_mul 5 Private strand multiplier for log space preallocation

_log_private_parallelism FALSE Number of private log buffer strands for zero-copy redo

_log_private_parallelism_mul 10 Active sessions multiplier to deduce number of private strands

_log_simultaneous_copies 4 number of simultaneous copies into redo buffer(# of copy latches)

_log_space_errors TRUE should we report space errors to alert log

_log_switch_timeout 0 Maximum number of seconds redos in the current log could span

_longops_enabled TRUE longops stats enabled

_low_server_threshold 0 low server thresholds

_master_direct_sends 31 direct sends for messages from master (DFS)

_mav_refresh_consistent_read TRUE refresh materialized views using consistent read snapshot

_mav_refresh_double_count_preven FALSE materialized view MAV refreshes avoid double counting

ted

_mav_refresh_opt 0 optimizations during refresh of materialized views

_mav_refresh_unionall_tables 3 # tables for union all expansion during materialized view refresh

_max_arch_lns_wait 120 Maximum wait by ARCH to allow NetServer to complete archival

_max_exponential_sleep 0 max sleep during exponential backoff

_max_lns_shutdown_archival_time 30 Maximum time spent by LNS to archive last log during shutdown

_max_protocol_support 10000 Max occurrence protocols supported in a process

_max_rfs_connections 0 maximum number of connections used for remote archival

_max_shrink_obj_stats 0 number of segments for which shrink stats will be maintained

_max_sleep_holding_latch 4 max time to sleep while holding a latch

_media_recovery_read_batch 128 media recovery block read batch

_media_recovery_reap_time 3 media recovery reap time

_mem_annotation_pr_lev 0 private memory annotation collection level

_mem_annotation_scale 1 memory annotation pre-allocation scaling

_mem_annotation_sh_lev 0 shared memory annotation collection level

_mem_annotation_store FALSE memory annotation in-memory store

_mem_std_extent_size 4096 standard extent size for fixed-size-extent heaps

_memory_broker_log_stat_entries 5 memory broker num stat entries

_memory_broker_shrink_heaps 15 memory broker allow policy to shrink shared pool

_memory_broker_shrink_java_heaps 900 memory broker allow policy to shrink java pool

_memory_broker_shrink_streams_po 900 memory broker allow policy to shrink streams pool

_memory_broker_shrink_timeout 60000000 memory broker policy to timeout shrink shared/java pool

_memory_broker_stat_interval 30 memory broker statistics gathering interval

_memory_management_tracing 0 trace memory management activity

_memory_sanity_check 0 partial granule sanity check

_messages 300 message queue resources - dependent on # processes & # buffers

_minimal_stats_aggregation TRUE prohibit stats aggregation at compile/partition maintenance time

_minimum_blocks_to_shrink 0 minimum number freeable blocks for shrink to be present

_minimum_extents_to_shrink 1 minimum number freeable extents for shrink to be present

_minimum_giga_scn 0 Minimum SCN to start with in 2^30 units

_mirror_redo_buffers FALSE Save buffers for debugging redo corruptions

_mmv_query_rewrite_enabled TRUE allow rewrites with multiple MVs and/or base tables

_multi_join_key_table_lookup TRUE TRUE iff multi-join-key table lookup prefetch is enabled

_multiple_instance_recovery FALSE use multiple instances for media recovery

_mv_refresh_ana 0 what percent to analyze after complete/PCT refresh

_mv_refresh_costing rule refresh decision based on cost or on rules

_mv_refresh_delta_fraction 10 delta mv as fractional percentage of size of mv

_mv_refresh_eut TRUE refresh materialized views using EUT(partition)-based algorithm

_mv_refresh_force_parallel_query 0 force materialized view refreshes to use parallel query

_mv_refresh_new_setup_disabled FALSE materialized view MV refresh new setup disabling

_mv_refresh_rebuild_percentage 10 minimum percentage change required in MV to force an index rebuild

_mv_refresh_selections TRUE create materialized views with selections and fast refresh

_mv_refresh_use_stats TRUE pass cardinality hints to refresh queries

_mv_refsched_timeincr 300000 proportionality constant for dop vs. time in MV refresh

_mv_rolling_inv FALSE create/alter mv uses rolling cursor invalidation instead of immediate

_mwin_schedule TRUE Enable/disable Maintenance Window Schedules

_nchar_imp_cnv TRUE NLS allow Implicit Conversion between CHAR and NCHAR

_nchar_imp_conv TRUE should implicit conversion bewteen clob and nclob be allowed

_ncmb_readahead_enabled 0 enable multi-block readahead for an index scan

_ncmb_readahead_tracing 0 turn on multi-block readahead tracing

_nested_loop_fudge 100 nested loop fudge

_nested_mav_fast_oncommit_enable TRUE nested MAV refresh fast on commit allowed

_new_initial_join_orders TRUE enable initial join orders based on new ordering heuristics

_new_sort_cost_estimate TRUE enables the use of new cost estimate for sort

_newsort_enabled TRUE controls whether new sorts can be used as system sort

_newsort_ordered_pct 63 controls when new sort avoids sorting ordered input

_newsort_type 0 specifies options for the new sort algorithm

_no_objects FALSE no object features are used

_no_or_expansion FALSE OR expansion during optimization disabled

_no_recovery_through_resetlogs FALSE no recovery through this resetlogs operation

_notify_crs FALSE notify cluster ready services of startup and shutdown

_ns_max_flush_wt 1 Flush wait time for NetServer to flush oustanding writes

_ns_max_send_delay 15 Data Loss Time Bound for NetServer

_num_longop_child_latches 2 number of child latches for long op array

_number_cached_attributes 10 maximum number of cached attributes per instance

_object_statistics TRUE enable the object level statistics collection

_offline_rollback_segments offline undo segment list

_ogms_home GMS home directory

_olap_aggregate_buffer_size 1048576 OLAP Aggregate max buffer size

_olap_aggregate_flags 0 OLAP Aggregate debug flags

_olap_aggregate_function_cache_e TRUE OLAP Aggregate function cache enabler

nabled

_olap_aggregate_function_merge_t 529 OLAP Aggregate function merge threshold

hreshold

_olap_aggregate_max_thread_tuple 5000 OLAP Aggregate max thread tuples creation

_olap_aggregate_min_buffer_size 1024 OLAP Aggregate min buffer size

_olap_aggregate_min_thread_statu 64 OLAP Aggregate minimum cardinality of dimensions for thread

_olap_aggregate_multipath_hier FALSE OLAP Aggregate Multi-path Hierarhies enabled

_olap_aggregate_statlen_thresh 1024 OLAP Aggregate status array usage threshold

_olap_aggregate_store_probabilit 100 OLAP Aggregate function storeback probability

_olap_aggregate_work_per_thread 1024 OLAP Aggregate max work parents

_olap_aggregate_worklist_max 5000 OLAP Aggregate max worklists generated at once

_olap_allocate_errorlog_format %8p %8y %8z %e (%n) OLAP Allocate Errorlog Format

_olap_allocate_errorlog_header Dim Source Basis OLAP Allocate Errorlog Header format

%-8d %-8s %-8b Descripti

-------- -------- ------

-- -----------

_olap_continuous_trace_file FALSE Specify TRUE to enable continuous OLAP tracing - otherwise only except

ional events will be logged

_olap_dbgoutfile_echo_to_eventlo FALSE OLAP DbgOutfile copy output to event log (tracefile)

_olap_dimension_corehash_class 1 OLAP Dimension In-Core Hash Table Class

_olap_dimension_corehash_max 10000 OLAP Dimension In-Core Hash Table Maximum Size

_olap_eif_export_lob_size 2147483647 OLAP EIF Export BLOB size

_olap_lmgen_dim_size 100 Limitmap generator dimension column size

_olap_lmgen_meas_size 1000 Limitmap generator measure column size

_olap_object_hash_class 2 OLAP Object Hash Table Class

_olap_page_pool_expand_rate 20 OLAP Page Pool Expand Rate

_olap_page_pool_hi 50 OLAP Page Pool High Watermark

_olap_page_pool_hit_target 100 OLAP Page Pool Hit Target

_olap_page_pool_low 262144 OLAP Page Pool Low Watermark

_olap_page_pool_pressure 90 OLAP Page Pool Pressure Threshold

_olap_page_pool_shrink_rate 50 OLAP Page Pool Shrink Rate

_olap_parallel_update_small_grou 400 OLAP parallel update pagespace by group

_olap_parallel_update_small_thre 1000 OLAP parallel update threshold for number of small pagespaces

shold

_olap_parallel_update_threshold 1000 OLAP parallel update threshold in pages

_olap_poutlog_echo_to_eventlog FALSE OLAP POutLog copy output to event log (tracefile)

_olap_sesscache_enabled TRUE OLAP Session Cache knob

_olap_sort_buffer_size 262144 OLAP Sort Buffer Size

_olap_statbool_corebits 20000000 OLAP Status Boolean max incore bits

_olap_statbool_threshold 8100 OLAP Status Boolean CBM threshold

_olap_table_function_statistics FALSE Specify TRUE to output OLAP table function timed statistics trace

_olap_wrap_errors FALSE Wrap error messages to OLAP outfile

_olapi_history_retention FALSE enable olapi history retention

_olapi_iface_object_history 1000 enable olapi interface object history collection

_olapi_iface_object_history_rete FALSE enable olapi interface object history retention

ntion

_olapi_iface_operation_history_r FALSE enable olapi interface operation history retention

etention

_olapi_interface_operation_histo 1000 enable olapi interface operation history collection

_olapi_memory_operation_history 1000 enable olapi memory alloc/free history collection

_olapi_memory_operation_history_ 0 enable olapi memory alloc/free history collection pausing

pause_at_seqno

_olapi_memory_operation_history_ FALSE enable olapi memory operation history retention

retention

_olapi_session_history 300 enable olapi session history collection

_olapi_session_history_retention FALSE enable olapi session history retention

_old_connect_by_enabled FALSE enable/disable old connect by

_ols_cleanup_task TRUE Clean up unnecessary entries in OLS sessinfo table

_omf enabled enable/disable OMF

_oneside_colstat_for_equijoins TRUE sanity check on default selectivity for like/range predicate

_optim_adjust_for_part_skews TRUE adjust stats for skews across partitions

_optim_dict_stats_at_db_cr_upg TRUE enable/disable dictionary stats gathering at db create/upgrade

_optim_enhance_nnull_detection TRUE TRUE to enable index [fast] full scan more often

_optim_new_default_join_sel TRUE improves the way default equijoin selectivity are computed

_optim_peek_user_binds TRUE enable peeking of user binds

_optimizer_adjust_for_nulls TRUE adjust selectivity for null values

_optimizer_autostats_job TRUE enable/disable auto stats collection job

_optimizer_better_inlist_costing ALL enable improved costing of index access using in-list(s)

_optimizer_block_size 8192 standard block size used by optimizer

_optimizer_cache_stats FALSE cost with cache statistics

_optimizer_cartesian_enabled TRUE optimizer cartesian join enabled

_optimizer_cbqt_factor 50 cost factor for cost-based query transformation

_optimizer_cbqt_no_size_restrict TRUE disable cost based transformation query size restriction

ion

_optimizer_ceil_cost TRUE CEIL cost in CBO

_optimizer_choose_permutation 0 force the optimizer to use the specified permutation

_optimizer_complex_pred_selectiv TRUE enable selectivity estimation for builtin functions

ity

_optimizer_compute_index_stats TRUE force index stats collection on index creation/rebuild

_optimizer_correct_sq_selectivit TRUE force correct computation of subquery selectivity

_optimizer_cost_based_transforma LINEAR enables cost-based query transformation

tion

_optimizer_cost_filter_pred FALSE enables costing of filter predicates in IO cost model

_optimizer_cost_hjsmj_multimatch TRUE add cost of generating result set when #rows per key > 1

_optimizer_cost_model CHOOSE optimizer cost model

_optimizer_degree 0 force the optimizer to use the same degree of parallelism

_optimizer_dim_subq_join_sel TRUE use join selectivity in choosing star transformation dimensions

_optimizer_disable_strans_sanity 0 disable star transformation sanity checks

_checks

_optimizer_dyn_smp_blks 32 number of blocks for optimizer dynamic sampling

_optimizer_enhanced_filter_push TRUE push filters before trying cost-based query transformation

_optimizer_extended_cursor_shari UDO optimizer extended cursor sharing

_optimizer_filter_pred_pullup TRUE use cost-based flter predicate pull up transformation

_optimizer_ignore_hints FALSE enables the embedded hints to be ignored

_optimizer_invalidation_period 18000 time window for invalidation of cursors of analyzed objects

_optimizer_join_elimination_enab TRUE optimizer join elimination enabled

led

_optimizer_join_order_control 3 controls the optimizer join order search algorithm

_optimizer_join_sel_sanity_check TRUE enable/disable sanity check for multi-column join selectivity

_optimizer_max_permutations 2000 optimizer maximum join permutations per query block

_optimizer_min_cache_blocks 10 set minimum cached blocks

_optimizer_mjc_enabled TRUE enable merge join cartesian

_optimizer_mode_force TRUE force setting of optimizer mode for user recursive SQL also

_optimizer_multiple_cenv generate and run plans using several compilation environments

_optimizer_new_join_card_computa TRUE compute join cardinality using non-rounded input values

tion

_optimizer_or_expansion DEPTH control or expansion approach used

_optimizer_order_by_elimination_ TRUE Eliminates order bys from views before query transformation

enabled

_optimizer_outer_to_anti_enabled TRUE Enable transformation of outer-join to anti-join if possible

_optimizer_percent_parallel 101 optimizer percent parallel

_optimizer_push_down_distinct 0 push down distinct from query block to table

_optimizer_push_pred_cost_based TRUE use cost-based query transformation for push pred optimization

_optimizer_random_plan 0 optimizer seed value for random plans

_optimizer_rownum_pred_based_fkr TRUE enable the use of first K rows due to rownum predicate

_optimizer_save_stats TRUE enable/disable saving old versions of optimizer stats

_optimizer_search_limit 5 optimizer search limit

_optimizer_self_induced_cache_co FALSE account for self-induced caching

_optimizer_skip_scan_enabled TRUE enable/disable index skip scan

_optimizer_sortmerge_join_enable TRUE enable/disable sort-merge join method

_optimizer_squ_bottomup TRUE enables unnesting of subquery in a bottom-up manner

_optimizer_star_tran_in_with_cla TRUE enable/disable star transformation in with clause queries

use

_optimizer_starplan_enabled TRUE optimizer star plan enabled

_optimizer_system_stats_usage TRUE system statistics usage

_optimizer_trace none optimizer trace parameter

_optimizer_transitivity_retain TRUE retain equi-join pred upon transitive equality pred generation

_optimizer_undo_changes FALSE undo changes to query optimizer

_optimizer_undo_cost_change 10.2.0.1 optimizer undo cost change

_or_expand_nvl_predicate TRUE enable OR expanded plan for NVL/DECODE predicate

_oradebug_force FALSE force target processes to execute oradebug commands?

_ordered_nested_loop TRUE enable ordered nested loop costing

_ordered_semijoin TRUE enable ordered semi-join subquery

_os_sched_high_priority 1 OS high priority level

_other_wait_event_exclusion exclude event names from _other_wait_threshold calculations

_other_wait_threshold 0 threshold wait percentage for event wait class Other

_outline_bitmap_tree TRUE BITMAP_TREE hint enabled in outline

_parallel_adaptive_max_users 2 maximum number of users running with default DOP

_parallel_broadcast_enabled TRUE enable broadcasting of small inputs to hash and sort merge joins

_parallel_default_max_instances 1 default maximum number of instances for parallel query

_parallel_execution_message_alig FALSE Alignment of PX buffers to OS page boundary

_parallel_fake_class_pct 0 fake db-scheduler percent used for testing

_parallel_fixwrite_bucket 1000 Number of buckets for each round of fix write

_parallel_load_bal_unit 0 number of threads to allocate per instance

_parallel_load_balancing TRUE parallel execution load balanced slave allocation

_parallel_min_message_pool 902160 minimum size of shared pool memory to reserve for pq servers

_parallel_recovery_stopat 32767 stop at -position- to step through SMON

_parallel_replay_msg_limit 4000 Number of messages for each round of parallel replay

_parallel_server_idle_time 30000 idle time before parallel query server dies (in 1/100 sec)

_parallel_server_sleep_time 10 sleep time between dequeue timeouts (in 1/100ths)

_parallel_slave_acquisition_wait 1 time(in seconds) to wait before retrying slave acquisition

_parallel_txn_global FALSE enable parallel_txn hint with updates and deletes

_parallelism_cost_fudge_factor 350 set the parallelism cost fudge factor

_parameter_table_block_size 1024 parameter table block size

_partial_pwise_join_enabled TRUE enable partial partition-wise join when TRUE

_partition_view_enabled TRUE enable/disable partitioned views

_passwordfile_enqueue_timeout 900 password file enqueue timeout in seconds

_pct_refresh_double_count_preven TRUE materialized view PCT refreshes avoid double counting

ted

_pdml_gim_sampling 5000 control separation of global index maintenance for PDML

_pdml_gim_staggered FALSE slaves start on different index when doing index maint

_pdml_slaves_diff_part TRUE slaves start on different partition when doing index maint

_percent_flashback_buf_partial_f 50 Percent of flashback buffer filled to be considered partial full

ull

_pga_large_extent_size 1048576 PGA large extent size

_pga_max_size 209715200 Maximum size of the PGA memory for one process

_ping_level 3 fusion ping level

_pkt_enable FALSE enable progressive kill test

_pkt_pmon_interval 50 PMON process clean-up interval (cs)

_pkt_start FALSE start progressive kill test instrumention

_plan_outline_data TRUE explain plan outline data enabled

_plsql_anon_block_code_type INTERPRETED PL/SQL anonymous block code-type

_plsql_cache_enable TRUE PL/SQL Function Cache Enabled

_plsql_dump_buffer_events conditions upon which the PL/SQL circular buffer is dumped

_plsql_minimum_cache_hit_percent 20 plsql minimum cache hit percentage required to keep caching active

_plsql_nvl_optimize FALSE PL/SQL NVL optimize

_pmon_load_constants 300,192,64,3,10,10,0,0 server load balancing constants (S,P,D,I,L,C,M)

_pre_rewrite_push_pred TRUE push predicates into views before rewrite

_precompute_gid_values TRUE precompute gid values and copy them before returning a row

_pred_move_around TRUE enables predicate move-around

_predicate_elimination_enabled TRUE allow predicate elimination if set to TRUE

_prescomm FALSE presume commit of IMU transactions

_print_refresh_schedule false enable dbms_output of materialized view refresh schedule

_private_memory_address Start address of large extent memory segment

_project_view_columns TRUE enable projecting out unreferenced columns of a view

_projection_pushdown TRUE projection pushdown

_projection_pushdown_debug 0 level for projection pushdown debugging

_push_join_predicate TRUE enable pushing join predicate inside a view

_push_join_union_view TRUE enable pushing join predicate inside a union all view

_push_join_union_view2 TRUE enable pushing join predicate inside a union view

_px_async_getgranule FALSE asynchronous get granule in the slave

_px_broadcast_fudge_factor 100 set the tq broadcasting fudge factor percentage

_px_buffer_ttl 30 ttl for px mesg buffers in seconds

_px_compilation_debug 0 debug level for parallel compilation

_px_compilation_trace 0 tracing level for parallel compilation

_px_dynamic_opt TRUE turn off/on restartable qerpx dynamic optimization

_px_dynamic_sample_size 50 num of samples for restartable qerpx dynamic optimization

_px_granule_size 100000 default size of a rowid range granule (in KB)

_px_index_sampling 200 parallel query sampling for index create (100000 = 100%)

_px_kxib_tracing 0 turn on kxib tracing

_px_load_publish_interval 200 interval at which LMON will check whether to publish PX load

_px_loc_msg_cost 1000 CPU cost to send a PX message via shared memory

_px_max_granules_per_slave 100 maximum number of rowid range granules to generate per slave

_px_min_granules_per_slave 13 minimum number of rowid range granules to generate per slave

_px_minus_intersect TRUE enables pq for minus/interect operators

_px_net_msg_cost 10000 CPU cost to send a PX message over the internconnect

_px_no_granule_sort FALSE prevent parallel partition granules to be sorted on size

_px_no_stealing FALSE prevent parallel granule stealing in shared nothing environment

_px_nss_planb TRUE enables or disables NSS Plan B reparse with outline

_px_proc_constrain TRUE reduce parallel_max_servers if greater than (processes - fudge)

_px_pwg_enabled TRUE parallel partition wise group by enabled

_px_rownum_pd TRUE turn off/on parallel rownum pushdown optimization

_px_send_timeout 300 IPC message send timeout value in seconds

_px_slaves_share_cursors 0 slaves share cursors with QC

_px_trace none px trace parameter

_px_xtgranule_size 10000 default size of a external table granule (in KB)

_qa_control 0 Oracle internal parameter to control QA

_qa_lrg_type 0 Oracle internal parameter to specify QA lrg type

_query_cost_rewrite TRUE perform. the cost based rewrite with materialized views

_query_execution_cache_max_size 65536 max size of query execution cache

_query_rewrite_1 TRUE perform. query rewrite before&after or only before view merging

_query_rewrite_2 TRUE perform. query rewrite before&after or only after view merging

_query_rewrite_drj TRUE mv rewrite and drop redundant joins

_query_rewrite_expression TRUE rewrite with cannonical form. for expressions

_query_rewrite_fpc TRUE mv rewrite fresh partition containment

_query_rewrite_fudge 90 cost based query rewrite with MVs fudge factor

_query_rewrite_jgmigrate TRUE mv rewrite with jg migration

_query_rewrite_maxdisjunct 257 query rewrite max disjuncts

_query_rewrite_or_error FALSE allow query rewrite, if referenced tables are not dataless

_query_rewrite_setopgrw_enable TRUE perform. general rewrite using set operator summaries

_query_rewrite_vop_cleanup TRUE prune frocol chain before rewrite after view-merging

_rcfg_parallel_fixwrite TRUE if TRUE enables parallel fixwrite at reconfiguration

_rcfg_parallel_replay TRUE if TRUE enables parallel replay and cleanup at reconfiguration

_rcfg_parallel_verify TRUE if TRUE enables parallel verify at reconfiguration

_real_time_apply_arch_delay 0 Archival delay with real time apply

_real_time_apply_sim 0 Simulation value with real time apply

_realfree_heap_max_size 32768 minimum max total heap size, in Kbytes

_realfree_heap_mode 0 mode flags for real-free heap

_realfree_heap_pagesize_hint 65536 hint for real-free page size in bytes

_recoverable_recovery_batch_perc 50 Recoverable recovery batch size (percentage of buffer cache)

ent

_recovery_asserts FALSE if TRUE, enable expensive integrity checks

_recovery_percentage 50 recovery buffer cache percentage

_recovery_verify_writes FALSE enable thread recovery write verify

_recursive_imu_transactions FALSE recursive transactions may be IMU

_redo_compatibility_check FALSE general and redo/undo compatibility sanity check

_release_insert_threshold 5 maximum number of unusable blocks to unlink from freelist

_reliable_block_sends FALSE if TRUE, block sends across interconnect are reliable

_remove_aggr_subquery TRUE enables removal of subsumed aggregated subquery

_resource_manager_always_on TRUE enable the resource manager always

_restore_spfile restore spfile to this location

_reuse_index_loop 5 number of blocks being examine for index block reuse

_right_outer_hash_enable TRUE Right Outer/Semi/Anti Hash Enabled

_rman_io_priority 3 priority at which rman backup i/o's are done

_rollback_segment_count 0 number of undo segments

_rollback_segment_initial 1 starting undo segment number

_rollback_stopat 0 stop at -position to step rollback

_row_cache_cursors 20 number of cached cursors for row cache management

_row_cr TRUE enable row cr for all sql

_row_locking always row-locking

_rowsource_execution_statistics FALSE if TRUE, Oracle will collect rowsource statistics

_rowsource_statistics_sampfreq 128 frequency of rowsource statistic sampling (must be a power of 2)

_rowsrc_trace_level 0 Row source tree tracing level

_sample_rows_per_block 4 number of rows per block used for sampling IO optimization

_second_spare_parameter second spare parameter - integer

_selfjoin_mv_duplicates TRUE control rewrite self-join algorithm

_selftune_checkpoint_write_pct 3 Percentage of total physical i/os for self-tune ckpt

_selftune_checkpointing_lag 300 Self-tune checkpointing lag the tail of the redo log

_send_ast_to_foreground TRUE if TRUE, send ast message to foreground

_send_close_with_block TRUE if TRUE, send close with block even with direct sends

_send_requests_to_pi TRUE if TRUE, try to send CR requests to PI buffers

_serial_direct_read FALSE enable direct read in serial

_serial_recovery FALSE force serial recovery or parallel recovery

_serializable FALSE serializable

_session_cached_instantiations 60 Number of pl/sql instantiations to cache in a session.

_session_context_size 10000 session app context size

_session_idle_bit_latches 0 one latch per session or a latch per group of sessions

_session_idle_check_interval 60 Resource Manager session idle limit check interval in seconds

_session_kept_cursor_pins 0 Number of cursors pins to keep in a session

_session_wait_history 10 enable session wait history collection

_seventh_spare_parameter seventh spare parameter - string list

_shared_pool_max_size 0 shared pool maximum size when auto SGA enabled

_shared_pool_reserved_min_alloc 4400 minimum allocation size in bytes for reserved area of shared pool

_shared_pool_reserved_pct 5 percentage memory of the shared pool allocated for the reserved area

_short_stack_timeout_ms 30000 short stack timeout in ms

_shrunk_aggs_disable_threshold 60 percentage of exceptions at which to switch to full length aggs

_shrunk_aggs_enabled TRUE enable use of variable sized buffers for non-distinct aggregates

_side_channel_batch_size 200 number of messages to batch in a side channel message (DFS)

_side_channel_batch_timeout 6 timeout before shipping out the batched side channelmessages

_simple_view_merging TRUE control simple view merging performed by the optimizer

_simulator_bucket_mindelta 8192 LRU bucket minimum delta

_simulator_internal_bound 10 simulator internal bound percent

_simulator_lru_rebalance_sizthr 2 LRU list rebalance threshold (size)

_simulator_lru_rebalance_thresh 10240 LRU list rebalance threshold (count)

_simulator_lru_scan_count 8 LRU scan count

_simulator_pin_inval_maxcnt 16 maximum count of invalid chunks on pin list

_simulator_reserved_heap_count 4096 simulator reserved heap count

_simulator_reserved_obj_count 1024 simulator reserved object count

_simulator_sampling_factor 2 sampling factor for the simulator

_simulator_upper_bound_multiple 2 upper bound multiple of pool size

_single_process FALSE run without detached processes

_sixth_spare_parameter sixth spare parameter - string list

_skgxp_reaping 1000 tune skgxp OSD reaping limit

_skgxp_udp_ach_reaping_time 120 time in minutes before idle ach's are reaped

_skgxp_udp_hiwat_warn 1000 ach hiwat mark warning interval

_skgxp_udp_interface_detection_t 60 time in seconds between interface detection checks

ime_secs

_skgxp_udp_keep_alive_ping_timer 300 connection idle time in seconds before keep alive is initiated. min: 3

_secs 0 sec max: 1800 sec default: 300 sec

_skgxp_udp_timed_wait_buffering 1024 diagnostic log buffering space (in bytes) for timed wait (0 means unbu

fferd

_skgxp_udp_timed_wait_seconds 5 time in seconds before timed wait is invoked

_skip_assume_msg TRUE if TRUE, skip assume message for consigns at the master

_slave_mapping_enabled TRUE enable slave mapping when TRUE

_slave_mapping_group_size 0 force the number of slave group in a slave mapper

_small_table_threshold 968 threshold level of table size for direct reads

_smm_advice_enabled TRUE if TRUE, enable v$pga_advice

_smm_advice_log_size 0 overwrites default size of the PGA advice workarea history log

_smm_auto_cost_enabled TRUE if TRUE, use the AUTO size policy cost functions

_smm_auto_max_io_size 248 Maximum IO size (in KB) used by sort/hash-join in auto mode

_smm_auto_min_io_size 56 Minimum IO size (in KB) used by sort/hash-join in auto mode

_smm_bound 0 overwrites memory manager automatically computed bound

_smm_control 0 provides controls on the memory manager

_smm_freeable_retain 5120 value in KB of the instance freeable PGA memory to retain

_smm_isort_cap 102400 maximum work area for insertion sort(v1)

_smm_max_size 39526 maximum work area size in auto mode (serial)

_smm_min_size 197 minimum work area size in auto mode

_smm_px_max_size 98816 maximum work area size in auto mode (global)

_smm_retain_size 0 work area retain size in SGA for shared server sessions (0 for AUTO)

_smm_trace 0 Turn on/off tracing for SQL memory manager

_smon_internal_errlimit 100 limit of SMON internal errors

_smu_debug_mode 0 - set debug event for testing SMU operations

_smu_error_simulation_site 0 site ID of error simulation in KTU code

_smu_error_simulation_type 0 error type for error simulation in KTU code

_smu_timeouts comma-separated *AND double-quoted* list of AUM timeouts: mql, tur, se

ss_exprn, qry_exprn, slot_intvl

_sort_elimination_cost_ratio 0 cost ratio for sort eimination under first_rows mode

_sort_multiblock_read_count 2 multi-block read count for sort

_spin_count 2000 Amount to spin waiting for a latch

_spr_max_rules 10000 maximum number of rules in sql spreadsheet

_spr_push_pred_refspr TRUE push predicates through reference spreadsheet

_spr_use_AW_AS TRUE enable AW for hash table in spreadsheet

_spr_use_hash_table FALSE use hash table for spreadsheet

_sql_connect_capability_override 0 SQL Connect Capability Table Override

_sql_connect_capability_table SQL Connect Capability Table (testing only)

_sql_hash_debug 0 Hash value of the SQL statement to debug

_sql_model_unfold_forloops RUN_TIME specifies compile-time unfolding of sql model forloops

_sqlexec_progression_cost 1000 sql execution progression monitoring cost threshold

_sqltune_category_parsed DEFAULT Parsed category qualifier for applying hintsets

_sta_control 0 SQL Tuning Advisory control parameter

_stack_guard_level 0 stack guard level

_static_backgrounds static backgrounds

_stn_trace 0 SQL tracing parameter

_streams_pool_max_size 0 streams pool maximum size when auto SGA enabled

_subquery_pruning_cost_factor 20 subquery pruning cost factor

_subquery_pruning_enabled TRUE enable the use of subquery predicates to perform. pruning

_subquery_pruning_mv_enabled FALSE enable the use of subquery predicates with MVs to perform. pruning

_subquery_pruning_reduction 50 subquery pruning reduction factor

_swrf_metric_frequent_mode FALSE Enable/disable SWRF Metric Frequent Mode Collection

_swrf_mmon_dbfus TRUE Enable/disable SWRF MMON DB Feature Usage

_swrf_mmon_flush TRUE Enable/disable SWRF MMON FLushing

_swrf_mmon_metrics TRUE Enable/disable SWRF MMON Metrics Collection

_swrf_on_disk_enabled TRUE Parameter to enable/disable SWRF

_swrf_test_action 0 test action parameter for SWRF

_swrf_test_dbfus FALSE Enable/disable DB Feature Usage Testing

_synonym_repoint_tracing FALSE whether to trace metadata comparisons for synonym repointing

_sysaux_test_param 1 test parameter for SYSAUX

_system_index_caching 0 optimizer percent system index caching

_system_trig_enabled TRUE are system triggers enabled

_ta_lns_wait_for_arch_log 20 LNS Wait time for arhcived version of online log

_table_lookup_prefetch_size 40 table lookup prefetch vector size

_table_lookup_prefetch_thresh 2 table lookup prefetch threshold

_table_scan_cost_plus_one TRUE bump estimated full table scan and index ffs cost by one

_target_rba_max_lag_percentage 90 target rba max log lag percentage

_tdb_debug_mode 16 set debug mode for testing transportable database

_temp_tran_block_threshold 100 number of blocks for a dimension before we temp transform

_temp_tran_cache TRUE determines if temp table is created with cache option

_test_ksusigskip 5 test the function ksusigskip

_test_param_1 25 test parmeter 1 - integer

_test_param_2 test parameter 2 - string

_test_param_3 test parameter 3 - string

_test_param_4 test parameter 4 - string list

_test_param_5 25 test parmeter 5 - deprecated integer

_test_param_6 0 test parmeter 6 - size (ub8)

_third_spare_parameter third spare parameter - integer

_threshold_alerts_enable 1 if 1, issue threshold-based alerts

_total_large_extent_memory 0 Total memory for allocating large extents

_tq_dump_period 0 time period for duping of TQ statistics (s)

_trace_archive FALSE start DIAG process

_trace_buffer_flushes FALSE trace buffer flushes if otrace cacheIO event is set

_trace_buffer_gets FALSE trace kcb buffer gets if otrace cacheIO event is set

_trace_buffer_wait_timeouts 0 trace buffer busy wait timeouts

_trace_buffer_wrap_timestamp TRUE enable KST timestamp on trace buffer wrap

_trace_buffers ALL:256 trace buffer sizes per process

_trace_cr_buffer_creates FALSE trace cr buffer creates if otrace cacheIO event is set

_trace_events trace events enabled at startup

_trace_file_size 65536 maximum size of trace file (in bytes)

_trace_files_public FALSE Create publicly accessible trace files

_trace_flush_processes ALL trace data archived by DIAG for these processes

_trace_multi_block_reads FALSE trace multi_block reads if otrace cacheIO event is set

_trace_navigation_scope global enabling trace navigation linking

_trace_options text,multiple trace data flush options

_trace_pin_time 0 trace how long a current pin is held

_trace_processes ALL enable KST tracing in process

_transaction_auditing TRUE transaction auditing records generated in the redo log

_transaction_recovery_servers 0 max number of parallel recovery slaves that may be used

_truncate_optimization_enabled TRUE do truncate optimization if set to TRUE

_tsm_connect_string TSM test connect string

_tsm_disable_auto_cleanup 1 Disable TSM auto cleanup actions

_tts_allow_charset_mismatch FALSE allow plugging in a tablespace with an incompatible character set

_two_pass TRUE enable two-pass thread recovery

_two_pass_reverse_polish_enabled TRUE uses two-pass reverse polish alg. to generate canonical forms

_uga_cga_large_extent_size 262144 UGA/CGA large extent size

_ultrafast_latch_statistics TRUE maintain fast-path statistics for ultrafast latches

_undo_autotune TRUE enable auto tuning of undo_retention

_undo_debug_mode 0 debug flag for undo related operations

_undo_debug_usage 0 invoke undo usage functions for testing

_union_rewrite_for_gs YES_GSET_MVS expand queries with GSets into UNIONs for rewrite

_unnest_subquery TRUE enables unnesting of correlated subqueries

_unused_block_compression FALSE enable unused block compression

_use_column_stats_for_function TRUE enable the use of column statistics for DDP functions

_use_ism TRUE Enable Shared Page Tables - ISM

_use_ism_for_pga TRUE Use ISM for allocating large extents

_use_nosegment_indexes FALSE use nosegment indexes in explain plan

_use_realfree_heap TRUE use real-free based allocator for PGA memory

_use_seq_process_cache TRUE whether to use process local seq cache

_use_vector_post TRUE use vector post

_validate_flashback_database FALSE Scan database to validate result of flashback database

_vendor_lib_loc Vendor library search root directory

_verify_flashback_redo TRUE Verify that the redo logs needed for flashback are available

_verify_undo_quota FALSE TRUE - verify consistency of undo quota statistics

_very_large_partitioned_table 1024 very_large_partitioned_table

_wait_for_sync TRUE wait for sync on commit MUST BE ALWAYS TRUE

_walk_insert_threshold 0 maximum number of unusable blocks to walk across freelist

_watchpoint_on FALSE is the watchpointing feature turned on?

_windowfunc_optimization_setting 0 settings for window function optimizations

_write_clones 3 write clones flag

_xpl_peeked_binds_log_size 8192 maximum bytes for logging peeked bind values for V$SQL_PLAN (0 = OFF)

_xpl_trace 0 Explain Plan tracing parameter

_xsolapi_auto_materialization_bo 20 OLAP API lower bound for auto materialization.

und

_xsolapi_auto_materialization_ty PRED_AND_RC OLAP API behavior. for auto materialization

_xsolapi_debug_output OLAP API debug output disposition

_xsolapi_densify_cubes TABULAR OLAP API cube densification

_xsolapi_dimension_group_creatio OVERFETCH OLAP API symmetric overfetch

_xsolapi_fetch_type PARTIAL OLAP API fetch type

_xsolapi_load_at_process_start NEVER When to load OLAP API library at server process start

_xsolapi_materialization_rowcach 1 OLAP API min number of rows required to use rowcache in query material

e_min_rows_for_use ization

_xsolapi_materialize_sources TRUE OLAP API Enable source materialization

_xsolapi_source_trace FALSE OLAP API output Source definitions to trace file

_xsolapi_sql_all_multi_join_non_ OLAP API multi-join non-base hints

base_hints

_xsolapi_sql_all_non_base_hints OLAP API non-base hints

_xsolapi_sql_auto_dimension_hint FALSE OLAP API enable automatic dimension hints

_xsolapi_sql_auto_measure_hints TRUE OLAP API enable automatic measure hints

_xsolapi_sql_dimension_hints OLAP API dimension hints

_xsolapi_sql_hints OLAP API generic hints

_xsolapi_sql_measure_hints OLAP API measure hints

_xsolapi_sql_optimize TRUE OLAP API enable optimization

_xsolapi_sql_prepare_stmt_cache_ 16 OLAP API prepare statement cache size

size

_xsolapi_sql_remove_columns TRUE OLAP API enable remove unused columns optimizations

_xsolapi_sql_result_set_cache_si 32 OLAP API result set cache size

_xsolapi_sql_symmetric_predicate TRUE OLAP API enable symmetric predicate for dimension groups

_xsolapi_sql_top_dimension_hints OLAP API top dimension hints

_xsolapi_sql_top_measure_hints OLAP API top measure hints

_xsolapi_sql_use_bind_variables TRUE OLAP API enable bind variables optimization

_xt_coverage none external tables code coverage parameter

_xt_trace none external tables trace parameter

_xtbuffer_size 0 buffer size in KB needed for populate/query operation

_xtts_allow_pre10 FALSE allow cross platform. for pre10 compatible tablespace

_xtts_set_platform_info FALSE set cross platform. info during file header read

_yield_check_interval 100000 interval to check whether actses should yield

active_instance_count number of active instances in the cluster database

aq_tm_processes 0 number of AQ Time Managers to start

archive_lag_target 0 Maximum number of seconds of redos the standby could lose

asm_diskgroups disk groups to mount automatically

asm_diskstring disk set locations for discovery

asm_power_limit 1 number of processes for disk rebalancing

audit_file_dest C:\ORACLE\PRODUCT\10.2.0 Directory in which auditing files are to reside

\ADMIN\CHIC\ADUMP

audit_sys_operations FALSE enable sys auditing

audit_trail NONE enable system auditing

background_core_dump partial Core Size for Background Processes

background_dump_dest C:\ORACLE\PRODUCT\10.2.0 Detached process dump directory

\ADMIN\CHIC\BDUMP

backup_tape_io_slaves FALSE BACKUP Tape I/O slaves

bitmap_merge_area_size 1048576 maximum memory allow for BITMAP MERGE

blank_trimming FALSE blank trimming semantics parameter

buffer_pool_keep Number of database blocks/latches in keep buffer pool

buffer_pool_recycle Number of database blocks/latches in recycle buffer pool

circuits max number of circuits

cluster_database FALSE if TRUE startup in cluster database mode

cluster_database_instances 1 number of instances to use for sizing cluster db SGA structures

cluster_interconnects interconnects for RAC use

commit_point_strength 1 Bias this node has toward not preparing in a two-phase commit

commit_write transaction commit log write behaviour

compatible 10.2.0.1.0 Database will be completely compatible with this software version

control_file_record_keep_time 7 control file record keep time in days

control_files C:\ORACLE\PRODUCT\10.2.0 control file names list

\ORADATA\CHIC\CONTROL01.

CTL, C:\ORACLE\PRODUCT\1

0.2.0\ORADATA\CHIC\CONTR

OL02.CTL, C:\ORACLE\PROD

UCT\10.2.0\ORADATA\CHIC\

CONTROL03.CTL

core_dump_dest C:\ORACLE\PRODUCT\10.2.0 Core dump directory

\ADMIN\CHIC\CDUMP

cpu_count 2 number of CPUs for this instance

create_bitmap_area_size 8388608 size of create bitmap buffer for bitmap index

create_stored_outlines create stored outlines for DML statements

cursor_sharing EXACT cursor sharing mode

cursor_space_for_time FALSE use more memory in order to get faster execution

db_16k_cache_size 0 Size of cache for 16K buffers

db_2k_cache_size 0 Size of cache for 2K buffers

db_32k_cache_size 0 Size of cache for 32K buffers

db_4k_cache_size 0 Size of cache for 4K buffers

db_8k_cache_size 0 Size of cache for 8K buffers

db_block_buffers 0 Number of database blocks cached in memory

db_block_checking FALSE header checking and data and index block checking

db_block_checksum TRUE store checksum in db blocks and check during reads

db_block_size 8192 Size of database block in bytes

db_cache_advice ON Buffer cache sizing advisory

db_cache_size 0 Size of DEFAULT buffer pool for standard block size buffers

db_create_file_dest default database location

db_create_online_log_dest_1 online log/controlfile destination #1

db_create_online_log_dest_2 online log/controlfile destination #2

db_create_online_log_dest_3 online log/controlfile destination #3

db_create_online_log_dest_4 online log/controlfile destination #4

db_create_online_log_dest_5 online log/controlfile destination #5

db_domain directory part of global database name stored with CREATE DATABASE

db_file_multiblock_read_count 16 db block to be read each IO

db_file_name_convert datafile name convert patterns and strings for standby/clone db

db_files 200 max allowable # db files

db_flashback_retention_target 1440 Maximum Flashback Database log retention time in minutes.

db_keep_cache_size 0 Size of KEEP buffer pool for standard block size buffers

db_name chic database name specified in CREATE DATABASE

db_recovery_file_dest c:\oracle\product\10.2.0 default database recovery file location

/flash_recovery_area

db_recovery_file_dest_size 2147483648 database recovery files size limit

db_recycle_cache_size 0 Size of RECYCLE buffer pool for standard block size buffers

db_unique_name chic Database Unique Name

db_writer_processes 1 number of background database writer processes to start

dbwr_io_slaves 0 DBWR I/O slaves

ddl_wait_for_locks FALSE Disable NOWAIT DML lock acquisitions

dg_broker_config_file1 C:\ORACLE\PRODUCT\10.2.0 data guard broker configuration file #1

\DB_1\DATABASE\DR1CHIC.D

dg_broker_config_file2 C:\ORACLE\PRODUCT\10.2.0 data guard broker configuration file #2

\DB_1\DATABASE\DR2CHIC.D

dg_broker_start FALSE start Data Guard broker framework (DMON process)

disk_asynch_io TRUE Use asynch I/O for random access devices

dispatchers (PROTOCOL=TCP) (SERVICE= specifications of dispatchers

chicXDB)

distributed_lock_timeout 60 number of seconds a distributed transaction waits for a lock

dml_locks 748 dml locks - one for each table modified in a transaction

drs_start FALSE start DG Broker monitor (DMON process)

event debug event control - default null string

fal_client FAL client

fal_server FAL server list

fast_start_io_target 0 Upper bound on recovery reads

fast_start_mttr_target 0 MTTR target of forward crash recovery in seconds

fast_start_parallel_rollback LOW max number of parallel recovery slaves that may be used

file_mapping FALSE enable file mapping

fileio_network_adapters Network Adapters for File I/O

filesystemio_options IO operations on filesystem files

fixed_date fixed SYSDATE value

gc_files_to_locks mapping between file numbers and global cache locks

gcs_server_processes 0 number of background gcs server processes to start

global_context_pool_size Global Application Context Pool Size in Bytes

global_names FALSE enforce that database links have same name as remote database

hash_area_size 131072 size of in-memory hash work area

hi_shared_memory_address 0 SGA starting address (high order 32-bits on 64-bit platforms)

hs_autoregister TRUE enable automatic server DD updates in HS agent self-registration

ifile include file in init.ora

instance_groups list of instance group names

instance_name chic instance name supported by the instance

instance_number 0 instance number

instance_type RDBMS type of instance to be executed

java_max_sessionspace_size 0 max allowed size in bytes of a Java sessionspace

java_pool_size 0 size in bytes of java pool

java_soft_sessionspace_limit 0 warning limit on size in bytes of a Java sessionspace

job_queue_processes 10 number of job queue slave processes

large_pool_size 0 size in bytes of large pool

ldap_directory_access NONE RDBMS's LDAP access option

license_max_sessions 0 maximum number of non-system user sessions allowed

license_max_users 0 maximum number of named users that can be created in the database

license_sessions_warning 0 warning level for number of non-system user sessions

local_listener local listener

lock_name_space lock name space used for generating lock names for standby/clone datab

ase

lock_sga FALSE Lock entire SGA in physical memory

log_archive_config log archive config parameter

log_archive_dest archival destination text string

log_archive_dest_1 archival destination #1 text string

log_archive_dest_10 archival destination #10 text string

log_archive_dest_2 archival destination #2 text string

log_archive_dest_3 archival destination #3 text string

log_archive_dest_4 archival destination #4 text string

log_archive_dest_5 archival destination #5 text string

log_archive_dest_6 archival destination #6 text string

log_archive_dest_7 archival destination #7 text string

log_archive_dest_8 archival destination #8 text string

log_archive_dest_9 archival destination #9 text string

log_archive_dest_state_1 enable archival destination #1 state text string

log_archive_dest_state_10 enable archival destination #10 state text string

log_archive_dest_state_2 enable archival destination #2 state text string

log_archive_dest_state_3 enable archival destination #3 state text string

log_archive_dest_state_4 enable archival destination #4 state text string

log_archive_dest_state_5 enable archival destination #5 state text string

log_archive_dest_state_6 enable archival destination #6 state text string

log_archive_dest_state_7 enable archival destination #7 state text string

log_archive_dest_state_8 enable archival destination #8 state text string

log_archive_dest_state_9 enable archival destination #9 state text string

log_archive_duplex_dest duplex archival destination text string

log_archive_format ARC%S_%R.%T archival destination format

log_archive_local_first TRUE Establish EXPEDITE attribute default value

log_archive_max_processes 2 maximum number of active ARCH processes

log_archive_min_succeed_dest 1 minimum number of archive destinations that must succeed

log_archive_start FALSE start archival process on SGA initialization

log_archive_trace 0 Establish archivelog operation tracing level

log_buffer 7024640 redo circular buffer size

log_checkpoint_interval 0 # redo blocks checkpoint threshold

log_checkpoint_timeout 1800 Maximum time interval between checkpoints in seconds

log_checkpoints_to_alert FALSE log checkpoint begin/end to alert file

log_file_name_convert logfile name convert patterns and strings for standby/clone db

logmnr_max_persistent_sessions 1 maximum number of threads to mine

max_commit_propagation_delay 0 Max age of new snapshot in .01 seconds

max_dispatchers max number of dispatchers

max_dump_file_size UNLIMITED Maximum size (blocks) of dump file

max_enabled_roles 150 max number of roles a user can have enabled

max_shared_servers max number of shared servers

nls_calendar NLS calendar system name

nls_comp NLS comparison

nls_currency NLS local currency symbol

nls_date_format NLS Oracle date format

nls_date_language NLS date language name

nls_dual_currency Dual currency symbol

nls_iso_currency NLS ISO currency territory name

nls_language AMERICAN NLS language name

nls_length_semantics BYTE create columns using byte or char semantics by default

nls_nchar_conv_excp FALSE NLS raise an exception instead of allowing implicit conversion

nls_numeric_characters NLS numeric characters

nls_sort NLS linguistic definition name

nls_territory AMERICA NLS territory name

nls_time_format time format

nls_time_tz_format time with timezone format

nls_timestamp_format time stamp format

nls_timestamp_tz_format timestampe with timezone format

object_cache_max_size_percent 10 percentage of maximum size over optimal of the user session's object c

ache

object_cache_optimal_size 102400 optimal size of the user session's object cache in bytes

olap_page_pool_size 0 size of the olap page pool in bytes

open_cursors 300 max # cursors per session

open_links 4 max # open links per session

open_links_per_instance 4 max # open links per instance

optimizer_dynamic_sampling 2 optimizer dynamic sampling

optimizer_features_enable 10.2.0.1 optimizer plan compatibility parameter

optimizer_index_caching 0 optimizer percent index caching

optimizer_index_cost_adj 100 optimizer index cost adjustment

optimizer_mode ALL_ROWS optimizer mode

optimizer_secure_view_merging TRUE optimizer secure view merging and predicate pushdown/movearound

os_authent_prefix OPS$ prefix for auto-logon accounts

os_roles FALSE retrieve roles from the operating system

parallel_adaptive_multi_user TRUE enable adaptive setting of degree for multiple user streams

parallel_automatic_tuning FALSE enable intelligent defaults for parallel execution parameters

parallel_execution_message_size 2148 message buffer size for parallel execution

parallel_instance_group instance group to use for all parallel operations

parallel_max_servers 40 maximum parallel query servers per instance

parallel_min_percent 0 minimum percent of threads required for parallel query

parallel_min_servers 0 minimum parallel query servers per instance

parallel_server FALSE if TRUE startup in parallel server mode

parallel_server_instances 1 number of instances to use for sizing OPS SGA structures

parallel_threads_per_cpu 2 number of parallel execution threads per CPU

pga_aggregate_target 202375168 Target size for the aggregate PGA memory consumed by the instance

plsql_ccflags PL/SQL ccflags

plsql_code_type INTERPRETED PL/SQL code-type

plsql_compiler_flags INTERPRETED, NON_DEBUG PL/SQL compiler flags

plsql_debug FALSE PL/SQL debug

plsql_native_library_dir plsql native library dir

plsql_native_library_subdir_coun 0 plsql native library number of subdirectories

plsql_optimize_level 2 PL/SQL optimize level

plsql_v2_compatibility FALSE PL/SQL version 2.x compatibility flag

plsql_warnings DISABLE:ALL PL/SQL compiler warnings settings

pre_page_sga FALSE pre-page sga for process

processes 150 user processes

query_rewrite_enabled TRUE allow rewrite of queries using materialized views if enabled

query_rewrite_integrity enforced perform. rewrite using materialized views with desired integrity

rdbms_server_dn RDBMS's Distinguished Name

read_only_open_delayed FALSE if TRUE delay opening of read only files until first access

recovery_parallelism 0 number of server processes to use for parallel recovery

recyclebin on recyclebin processing

remote_archive_enable true remote archival enable setting

remote_dependencies_mode TIMESTAMP remote-procedure-call dependencies mode parameter

remote_listener remote listener

remote_login_passwordfile EXCLUSIVE password file usage parameter

remote_os_authent FALSE allow non-secure remote clients to use auto-logon accounts

remote_os_roles FALSE allow non-secure remote clients to use os roles

replication_dependency_tracking TRUE tracking dependency for Replication parallel propagation

resource_limit FALSE master switch for resource limit

resource_manager_plan resource mgr top plan

resumable_timeout 0 set resumable_timeout

rollback_segments undo segment list

serial_reuse disable reuse the frame. segments

service_names chic service names supported by the instance

session_cached_cursors 20 Number of cursors to cache in a session.

session_max_open_files 10 maximum number of open files allowed per session

sessions 170 user and system sessions

sga_max_size 612368384 max total SGA size

sga_target 612368384 Target size of SGA

shadow_core_dump partial Core Size for Shadow Processes

shared_memory_address 0 SGA starting address (low order 32-bits on 64-bit platforms)

shared_pool_reserved_size 9437184 size in bytes of reserved area of shared pool

shared_pool_size 0 size in bytes of shared pool

shared_server_sessions max number of shared server sessions

shared_servers 1 number of shared servers to start up

skip_unusable_indexes TRUE skip unusable indexes if set to TRUE

smtp_out_server utl_smtp server and port configuration parameter

sort_area_retained_size 0 size of in-memory sort work area retained between fetch calls

sort_area_size 65536 size of in-memory sort work area

spfile C:\ORACLE\PRODUCT\10.2.0 server parameter file

\DB_1\DBS\SPFILECHIC.ORA

sql92_security FALSE require select privilege for searched update/delete

sql_trace FALSE enable SQL trace

sql_version NATIVE sql language version parameter for compatibility issues

sqltune_category DEFAULT Category qualifier for applying hintsets

standby_archive_dest %ORACLE_HOME%\RDBMS standby database archivelog destination text string

standby_file_management MANUAL if auto then files are created/dropped automatically on standby

star_transformation_enabled FALSE enable the use of star transformation

statistics_level TYPICAL statistics level

streams_pool_size 0 size in bytes of the streams pool

tape_asynch_io TRUE Use asynch I/O requests for tape devices

thread 0 Redo thread to mount

timed_os_statistics 0 internal os statistic gathering interval in seconds

timed_statistics TRUE maintain internal timing statistics

trace_enabled TRUE enable KST tracing

tracefile_identifier trace file custom identifier

transactions 187 max. number of concurrent active transactions

transactions_per_rollback_segmen 5 number of active transactions per rollback segment

undo_management AUTO instance runs in SMU mode if TRUE, else in RBU mode

undo_retention 900 undo retention in seconds

undo_tablespace UNDOTBS1 use/switch undo tablespace

use_indirect_data_buffers FALSE Enable indirect data buffers (very large SGA on 32-bit platforms)

user_dump_dest C:\ORACLE\PRODUCT\10.2.0 User process dump directory

\ADMIN\CHIC\UDUMP

utl_file_dir utl_file accessible directories list

workarea_size_policy AUTO policy used to size SQL working areas (MANUAL/AUTO)

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SQL>

----------------------

以上。

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【DBA脚本】查看隐含参数

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