oradebug 简介！
1、命令简介
SQL> oradebug help HELP [command] 描述一个或所有的命令 SETMYPID Debug current process SETOSPID <ospid> Set OS pid of process to debug SETORAPID <orapid> ['force'] Set Oracle pid of process to debug SETORAPNAME <orapname> Set Oracle process name to debug SHORT_STACK Get abridged OS stack CURRENT_SQL Get current SQL DUMP <dump_name> <lvl> [addr] Invoke named dump DUMPSGA [bytes] Dump fixed SGA DUMPLIST 打印可用的转储列表 EVENT <text> Set trace event in process SESSION_EVENT <text> Set trace event in session DUMPVAR <p|s|uga> <name> [level] Print/dump a fixed PGA/SGA/UGA variable DUMPTYPE <address> <type> <count> Print/dump an address with type info SETVAR <p|s|uga> <name> <value> Modify a fixed PGA/SGA/UGA variable PEEK <addr> <len> [level] Print/Dump memory POKE <addr> <len> <value> Modify memory WAKEUP <orapid> Wake up Oracle process SUSPEND 暂停执行 RESUME 继续执行 FLUSH Flush pending writes to trace file CLOSE_TRACE 关闭跟踪文件 TRACEFILE_NAME 获取跟踪文件路径名 LKDEBUG Invoke global enqueue service debugger NSDBX Invoke CGS name-service debugger -G <Inst-List | def | all> Parallel oradebug command prefix -R <Inst-List | def | all> Parallel oradebug prefix (return output SETINST <instance# .. | all> Set instance list in double quotes SGATOFILE <SGA dump dir> Dump SGA to file; dirname in double quotes DMPCOWSGA <SGA dump dir> Dump & map SGA as COW; dirname in double quotes MAPCOWSGA <SGA dump dir> Map SGA as COW; dirname in double quotes HANGANALYZE [level] [syslevel] Analyze system hang FFBEGIN Flash Freeze the Instance FFDEREGISTER FF deregister instance from cluster FFTERMINST Call exit and terminate instance FFRESUMEINST Resume the flash frozen instance FFSTATUS Flash freeze status of instance SKDSTTPCS <ifname> <ofname> Helps translate PCs to names WATCH <address> <len> <self|exist|all|target> Watch a region of memory DELETE <local|global|target> watchpoint <id> Delete a watchpoint SHOW <local|global|target> watchpoints Show watchpoints DIRECT_ACCESS <set/enable/disable command | select query> Fixed table access CORE Dump core without crashing process IPC Dump ipc information UNLIMIT 取消跟踪文件的大小限制 PROCSTAT Dump process statistics CALL [-t count] <func> [arg1]...[argn] Invoke function with arguments
2、简单使用
查询一个用户的id信息：
SQL> select sid from v$mystat where rownum = 1;
SID
----------
43
SQL> select PADDR from v$session where sid = 43;
PADDR
--------
2E3CC354
SQL> select PID,SPID from v$process where ADDR = '2E3CC354';
PID SPID
---------- ------------------------
33 6852
SQL> show user
USER 为 "U1"设定追踪：
SQL> oradebug setospid 6852 Oracle pid: 33, Unix process pid: 6852, image: oracle@linux (TNS V1-V3)或者
SQL> oradebug setorapid 33 Oracle pid: 33, Unix process pid: 6852, image: oracle@linux (TNS V1-V3)可以使用 dumplist 把所有可以的 dump内容 出来：
SQL> oradebug dumplist TRACE_BUFFER_ON TRACE_BUFFER_OFF LATCHES PROCESSSTATE SYSTEMSTATE INSTANTIATIONSTATE REFRESH_OS_STATS CROSSIC CONTEXTAREA HANGDIAG_HEADER HEAPDUMP HEAPDUMP_ADDR POKE_ADDRESS POKE_LENGTH POKE_VALUE POKE_VALUE0 GLOBAL_AREA REALFREEDUMP FLUSH_JAVA_POOL POOL_SIMULATOR PGA_DETAIL_GET PGA_DETAIL_DUMP PGA_DETAIL_CANCEL PGA_SUMMARY MODIFIED_PARAMETERS EVENT_TSM_TEST ERRORSTACK CALLSTACK TEST_STACK_DUMP TEST_GET_CALLER RECORD_CALLSTACK EXCEPTION_DUMP BG_MESSAGES ENQUEUES KSTDUMPCURPROC KSTDUMPALLPROCS KSTDUMPALLPROCS_CLUSTER SIMULATE_EOV KSFQP_LIMIT KSKDUMPTRACE DBSCHEDULER LDAP_USER_DUMP LDAP_KERNEL_DUMP DUMP_ALL_OBJSTATS DUMPGLOBALDATA HANGANALYZE HANGANALYZE_PROC HANGANALYZE_GLOBAL GES_STATE OCR CSS CRS SYSTEMSTATE_GLOBAL GIPC MMAN_ALLOC_MEMORY MMAN_CREATE_DEF_REQUEST MMAN_CREATE_IMM_REQUEST MMAN_IMM_REQUEST DUMP_ALL_COMP_GRANULE_ADDRS DUMP_ALL_COMP_GRANULES DUMP_ALL_REQS DUMP_TRANSFER_OPS DUMP_ADV_SNAPSHOTS ADJUST_SCN NEXT_SCN_WRAP CONTROLF FLUSH_CACHE FULL_DUMPS BUFFERS RECOVERY SET_TSN_P1 BUFFER PIN_BLOCKS BC_SANITY_CHECK PIN_RANDOM_BLOCKS SET_NBLOCKS CHECK_ROREUSE_SANITY DUMP_PINNED_BUFFER_HISTORY KCBO_OBJ_CHECK_DUMP KCB_WORKING_SET_DUMP REDOLOGS ARCHIVE_ERROR LOGHIST REDOHDR LOGERROR OPEN_FILES DATA_ERR_ON DATA_READ_ERR_ON DATA_ERR_OFF BLK0_FMTCHG UPDATE_BLOCK0_FORMAT TR_SET_BLOCK TR_SET_ALL_BLOCKS TR_SET_SIDE TR_CRASH_AFTER_WRITE TR_READ_ONE_SIDE TR_CORRUPT_ONE_SIDE TR_RESET_NORMAL TEST_DB_ROBUSTNESS LOCKS GC_ELEMENTS FILE_HDRS KRB_CORRUPT_INTERVAL KRB_CORRUPT_SIZE KRB_CORRUPT_REPEAT KRB_CORRUPT_OFFSET KRB_PIECE_FAIL KRB_OPTIONS KRB_FAIL_INPUT_FILENO KRB_SIMULATE_NODE_AFFINITY KRB_TRACE KRB_BSET_DAYS KRB_SET_TIME_SWITCH KRB_OVERWRITE_ACTION KRB_CORRUPT_SPHEADER_INTERVAL KRB_CORRUPT_SPHEADER_REPEAT KRB_CORRUPT_SPBITMAP_INTERVAL KRB_CORRUPT_SPBITMAP_REPEAT KRB_CORRUPT_SPBAD_INTERVAL KRB_CORRUPT_SPBAD_REPEAT KRB_UNUSED_OPTION KRBMRSR_LIMIT KRBMROR_LIMIT KRBABR_TRACE KRDRSBF KRC_TRACE KRA_OPTIONS KRA_TRACE FBTAIL FBINC FBHDR FLASHBACK_GEN KTPR_DEBUG DUMP_TEMP DROP_SEGMENTS TEST_SPACEBG TREEDUMP LONGF_CREATE KDLIDMP ROW_CACHE LIBRARY_CACHE LIBRARY_CACHE_OBJECT CURSORDUMP CURSORTRACE CURSOR_STATS XS_SESSION_STATE SHARED_SERVER_STATE LISTENER_REGISTRATION JAVAINFO KXFPCLEARSTATS KXFPDUMPTRACE KXFPBLATCHTEST KXFXSLAVESTATE KXFXCURSORSTATE KXFRHASHMAP WORKAREATAB_DUMP KUPPLATCHTEST OBJECT_CACHE SAVEPOINTS RULESETDUMP RULESETDUMP_ADDR FAILOVER OLAP_DUMP SELFTESTASM ASMDISK_ERR_ON ASMDISK_READ_ERR_ON ASMDISK_ERR_OFF IOERREMUL IOERREMULRNG ALRT_TEST AWR_TEST AWR_FLUSH_TABLE_ON AWR_FLUSH_TABLE_OFF ASHDUMP MMON_TEST ATSK_TEST HM_FW_TRACE HM_FDG_VERS IR_FW_TRACE KSDTRADV_TEST在这些dump选项中，大部分都有2，4，6，8，10，12等几个跟踪级别。在使用的时候要根据具体的情况来选择级别，不同级别的影响不一样。
3、获得系统状态
SQL> oradebug setospid 6852 Oracle pid: 33, Unix process pid: 6852, image: oracle@linux (TNS V1-V3) SQL> oradebug flush 已处理的语句 SQL> oradebug unlimit 已处理的语句 SQL> oradebug tracefile_name /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_6852.trc SQL> oradebug dump systemstate 10 已处理的语句 SQL> oradebug close_trace 已处理的语句
4、获得某个进程状态
-- 注意，这里必须是Oracle 的进程
SQL> oradebug setospid 6852 Oracle pid: 33, Unix process pid: 6852, image: oracle@linux (TNS V1-V3) SQL> oradebug unlimit 已处理的语句 SQL> oradebug tracefile_name /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_6852.trc SQL> oradebug dump processstate 10 已处理的语句 SQL> oradebug close_trace 已处理的语句5、获得进程的错误信息状态
SQL> oradebug setospid 6852 Oracle pid: 33, Unix process pid: 6852, image: oracle@linux (TNS V1-V3) SQL> oradebug unlimit 已处理的语句 SQL> oradebug tracefile_name/u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_6852.trc SQL> oradebug dump errorstack 3 已处理的语句 SQL> oradebug close_trace 已处理的语句6、利用oradebug追踪10046事件
SQL> oradebug setospid 6852 Oracle pid: 33, Unix process pid: 6852, image: oracle@linux (TNS V1-V3) SQL> oradebug unlimit 已处理的语句 SQL> oradebug tracefile_name /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_6852.trc SQL> oradebug event 10046 trace name context forever,level 4 已处理的语句 SQL> oradebug event 10046 trace name context off 已处理的语句 SQL> oradebug close_trace 已处理的语句7、例如要追踪能造成ORA-0094/952错误的会话
SQL> oradebug event 942 trace name errorstack level 3 SQL> oradebug event 952 trace name errorstack level 38、暂停、启动进程
SQL> oradebug setospid 6852 Oracle pid: 33, Unix process pid: 6852, image: oracle@linux (TNS V1-V3) SQL> oradebug SUSPEND 已处理的语句 SQL> oradebug RESUME 已处理的语句 SQL> oradebug close_trace 已处理的语句