高性能mysql读书笔记
1、
mysql> set profiling = 1; Query OK, 0 rows affected (0.00 sec)
mysql> select channel,reg_count_pay from t_channel_reg_stat where stat_date='2015-05-24' order by channel desc limit 10; +---------+---------------+ | channel | reg_count_pay | +---------+---------------+ | 83318 | 0 | | 83316 | 7 | | 83315 | 47 | | 83298 | 14 | | 83297 | 2 | | 83252 | 166 | | 83251 | 17 | | 83250 | 9 | | 83249 | 47 | | 83248 | 2 | +---------+---------------+ 10 rows in set (0.00 sec)
mysql> show profiles; +----------+------------+------------------------------------------------------------------------------------------------------------------+ | Query_ID | Duration | Query | +----------+------------+------------------------------------------------------------------------------------------------------------------+ | 1 | 0.00022400 | select channel,reg_count_pay from t_channel_reg_stat where stat_date='2015-05-24' order by channel desc limit 10 | +----------+------------+------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)
mysql> show profile for query 1; +----------------------+----------+ | Status | Duration | +----------------------+----------+ | starting | 0.000037 | | checking permissions | 0.000003 | | Opening tables | 0.000010 | | System lock | 0.000005 | | init | 0.000014 | | optimizing | 0.000008 | | statistics | 0.000044 | | preparing | 0.000017 | | executing | 0.000002 | | Sorting result | 0.000003 | | Sending data | 0.000057 | | end | 0.000003 | | query end | 0.000002 | | closing tables | 0.000003 | | freeing items | 0.000012 | | logging slow query | 0.000002 | | cleaning up | 0.000002 | +----------------------+----------+ 17 rows in set (0.00 sec)
show status; +------------------------------------------+---------------+ | Variable_name | Value | +------------------------------------------+---------------+ | Aborted_clients | 156810 | | Aborted_connects | 51 | | Binlog_cache_disk_use | 573766 | | Binlog_cache_use | 357393596 | | Binlog_stmt_cache_disk_use | 0 | | Binlog_stmt_cache_use | 0 | | Bytes_received | 4883 | | Bytes_sent | 182421 | | Com_admin_commands | 0 | | Com_assign_to_keycache | 0 | | Com_alter_db | 0 | | Com_alter_db_upgrade | 0 | | Com_alter_event | 0 | | Com_alter_function | 0 | | Com_alter_procedure | 0 | | Com_alter_server | 0 | | Com_alter_table | 0 | | Com_alter_tablespace | 0 | | Com_analyze | 0 | | Com_begin | 0 | | Com_binlog | 0 | | Com_call_procedure | 0 | | Com_change_db | 0 | | Com_change_master | 0 | | Com_check | 0 | | Com_checksum | 0 | | Com_commit | 0 | | Com_create_db | 0 | | Com_create_event | 0 | | Com_create_function | 0 | | Com_create_index | 0 | | Com_create_procedure | 0 | | Com_create_server | 0 | | Com_create_table | 0 | | Com_create_trigger | 0 | | Com_create_udf | 0 | | Com_create_user | 0 | | Com_create_view | 0 | | Com_dealloc_sql | 0 | | Com_delete | 0 | | Com_delete_multi | 0 | | Com_do | 0 | | Com_drop_db | 0 | | Com_drop_event | 0 | | Com_drop_function | 0 | | Com_drop_index | 0 | | Com_drop_procedure | 0 | | Com_drop_server | 0 | | Com_drop_table | 0 | | Com_drop_trigger | 0 | | Com_drop_user | 0 | | Com_drop_view | 0 | | Com_empty_query | 0 | | Com_execute_sql | 0 | | Com_flush | 0 | | Com_grant | 0 | | Com_ha_close | 0 | | Com_ha_open | 0 | | Com_ha_read | 0 | | Com_help | 0 | | Com_insert | 0 | | Com_insert_select | 0 | | Com_install_plugin | 0 | | Com_kill | 0 | | Com_load | 0 | | Com_lock_tables | 0 | | Com_optimize | 0 | | Com_preload_keys | 0 | | Com_prepare_sql | 0 | | Com_purge | 0 | | Com_purge_before_date | 0 | | Com_release_savepoint | 0 | | Com_rename_table | 0 | | Com_rename_user | 0 | | Com_repair | 0 | | Com_replace | 0 | | Com_replace_select | 0 | | Com_reset | 0 | | Com_resignal | 0 | | Com_revoke | 0 | | Com_revoke_all | 0 | | Com_rollback | 0 | | Com_rollback_to_savepoint | 0 | | Com_savepoint | 0 | | Com_select | 3 | | Com_set_option | 1 | | Com_signal | 0 | | Com_show_authors | 0 | | Com_show_binlog_events | 0 | | Com_show_binlogs | 0 | | Com_show_charsets | 0 | | Com_show_client_statistics | 0 | | Com_show_collations | 0 | | Com_show_contributors | 0 | | Com_show_create_db | 0 | | Com_show_create_event | 0 | | Com_show_create_func | 0 | | Com_show_create_proc | 0 | | Com_show_create_table | 0 | | Com_show_create_trigger | 0 | | Com_show_databases | 1 | | Com_show_engine_logs | 0 | | Com_show_engine_mutex | 0 | | Com_show_engine_status | 0 | | Com_show_events | 0 | | Com_show_errors | 0 | | Com_show_fields | 134 | | Com_show_function_status | 0 | | Com_show_grants | 0 | | Com_show_index_statistics | 0 | | Com_show_keys | 0 | | Com_show_master_status | 0 | | Com_show_open_tables | 0 | | Com_show_plugins | 0 | | Com_show_privileges | 0 | | Com_show_procedure_status | 0 | | Com_show_processlist | 0 | | Com_show_profile | 1 | | Com_show_profiles | 4 | | Com_show_relaylog_events | 0 | | Com_show_slave_hosts | 0 | | Com_show_slave_status | 0 | | Com_show_slave_status_nolock | 0 | | Com_show_status | 1 | | Com_show_storage_engines | 0 | | Com_show_table_statistics | 0 | | Com_show_table_status | 0 | | Com_show_tables | 2 | | Com_show_temporary_tables | 0 | | Com_show_thread_statistics | 0 | | Com_show_triggers | 0 | | Com_show_user_statistics | 0 | | Com_show_variables | 0 | | Com_show_warnings | 0 | | Com_slave_start | 0 | | Com_slave_stop | 0 | | Com_stmt_close | 0 | | Com_stmt_execute | 0 | | Com_stmt_fetch | 0 | | Com_stmt_prepare | 0 | | Com_stmt_reprepare | 0 | | Com_stmt_reset | 0 | | Com_stmt_send_long_data | 0 | | Com_truncate | 0 | | Com_uninstall_plugin | 0 | | Com_unlock_tables | 0 | | Com_update | 0 | | Com_update_multi | 0 | | Com_xa_commit | 0 | | Com_xa_end | 0 | | Com_xa_prepare | 0 | | Com_xa_recover | 0 | | Com_xa_rollback | 0 | | Com_xa_start | 0 | | Compression | OFF | | Connections | 1131727 | | Created_tmp_disk_tables | 0 | | Created_tmp_files | 274989 | | Created_tmp_tables | 4 | | Delayed_errors | 0 | | Delayed_insert_threads | 0 | | Delayed_writes | 0 | | Flashcache_enabled | OFF | | Flush_commands | 1 | | Handler_commit | 2 | | Handler_delete | 0 | | Handler_discover | 0 | | Handler_prepare | 0 | | Handler_read_first | 0 | | Handler_read_key | 6 | | Handler_read_last | 0 | | Handler_read_next | 0 | | Handler_read_prev | 18 | | Handler_read_rnd | 0 | | Handler_read_rnd_next | 297 | | Handler_rollback | 0 | | Handler_savepoint | 0 | | Handler_savepoint_rollback | 0 | | Handler_update | 0 | | Handler_write | 293 | | Innodb_adaptive_hash_cells | 63749369 | | Innodb_adaptive_hash_heap_buffers | 8265 | | Innodb_adaptive_hash_hash_searches | 18485200134 | | Innodb_adaptive_hash_non_hash_searches | 5205407083 | | Innodb_background_log_sync | 13529356 | | Innodb_buffer_pool_pages_data | 1951445 | | Innodb_buffer_pool_pages_dirty | 25528 | | Innodb_buffer_pool_pages_flushed | 446103234 | | Innodb_buffer_pool_pages_LRU_flushed | 124178 | | Innodb_buffer_pool_pages_free | 834 | | Innodb_buffer_pool_pages_made_not_young | 0 | | Innodb_buffer_pool_pages_made_young | 449194592 | | Innodb_buffer_pool_pages_misc | 13800 | | Innodb_buffer_pool_pages_old | 720337 | | Innodb_buffer_pool_pages_total | 1966079 | | Innodb_buffer_pool_read_ahead_rnd | 0 | | Innodb_buffer_pool_read_ahead | 199203193 | | Innodb_buffer_pool_read_ahead_evicted | 4039474 | | Innodb_buffer_pool_read_requests | 320640268261 | | Innodb_buffer_pool_reads | 52957537 | | Innodb_buffer_pool_wait_free | 163 | | Innodb_buffer_pool_write_requests | 17463533334 | | Innodb_checkpoint_age | 529636295 | | Innodb_checkpoint_max_age | 868076054 | | Innodb_checkpoint_target_age | 840948678 | | Innodb_data_fsyncs | 24315069 | | Innodb_data_pending_fsyncs | 0 | | Innodb_data_pending_reads | 0 | | Innodb_data_pending_writes | 0 | | Innodb_data_read | 4366512132096 | | Innodb_data_reads | 266511048 | | Innodb_data_writes | 951145167 | | Innodb_data_written | 8442937628160 | | Innodb_dblwr_pages_written | 223051617 | | Innodb_dblwr_writes | 3642022 | | Innodb_deadlocks | 1 | | Innodb_dict_tables | 161 | | Innodb_have_atomic_builtins | ON | | Innodb_history_list_length | 797 | | Innodb_ibuf_discarded_delete_marks | 0 | | Innodb_ibuf_discarded_deletes | 0 | | Innodb_ibuf_discarded_inserts | 0 | | Innodb_ibuf_free_list | 25434 | | Innodb_ibuf_merged_delete_marks | 112922322 | | Innodb_ibuf_merged_deletes | 288659 | | Innodb_ibuf_merged_inserts | 29333763 | | Innodb_ibuf_merges | 14677675 | | Innodb_ibuf_segment_size | 25436 | | Innodb_ibuf_size | 1 | | Innodb_log_waits | 0 | | Innodb_log_write_requests | 1722693556 | | Innodb_log_writes | 721145223 | | Innodb_lsn_current | 3155897315370 | | Innodb_lsn_flushed | 3155897312759 | | Innodb_lsn_last_checkpoint | 3155367679075 | | Innodb_master_thread_1_second_loops | 13504601 | | Innodb_master_thread_10_second_loops | 1345550 | | Innodb_master_thread_background_loops | 161174 | | Innodb_master_thread_main_flush_loops | 161109 | | Innodb_master_thread_sleeps | 13504504 | | Innodb_max_trx_id | 1941989756 | | Innodb_mem_adaptive_hash | 645429312 | | Innodb_mem_dictionary | 128653009 | | Innodb_mem_total | 33093058560 | | Innodb_mutex_os_waits | 2068898 | | Innodb_mutex_spin_rounds | 269563778 | | Innodb_mutex_spin_waits | 222676083 | | Innodb_oldest_view_low_limit_trx_id | 1941989749 | | Innodb_os_log_fsyncs | 14803645 | | Innodb_os_log_pending_fsyncs | 0 | | Innodb_os_log_pending_writes | 0 | | Innodb_os_log_written | 1133241438720 | | Innodb_page_size | 16384 | | Innodb_pages_created | 17689552 | | Innodb_pages_read | 266510623 | | Innodb_pages_written | 223051617 | | Innodb_purge_trx_id | 1941989603 | | Innodb_purge_undo_no | 0 | | Innodb_row_lock_current_waits | 0 | | Innodb_current_row_locks | 802430 | | Innodb_row_lock_time | 8849952 | | Innodb_row_lock_time_avg | 263 | | Innodb_row_lock_time_max | 22417 | | Innodb_row_lock_waits | 33551 | | Innodb_rows_deleted | 1085040842 | | Innodb_rows_inserted | 1407642903 | | Innodb_rows_read | 782362930932 | | Innodb_rows_updated | 32616126 | | Innodb_s_lock_os_waits | 9373904 | | Innodb_s_lock_spin_rounds | 398810071 | | Innodb_s_lock_spin_waits | 35437199 | | Innodb_truncated_status_writes | 0 | | Innodb_x_lock_os_waits | 5544547 | | Innodb_x_lock_spin_rounds | 381840076 | | Innodb_x_lock_spin_waits | 41364934 | | Key_blocks_not_flushed | 0 | | Key_blocks_unused | 6698 | | Key_blocks_used | 6698 | | Key_read_requests | 1537879702 | | Key_reads | 202312536 | | Key_write_requests | 325044309 | | Key_writes | 188578598 | | Last_query_cost | 10.499000 | | Max_used_connections | 113 | | Not_flushed_delayed_rows | 0 | | Open_files | 60 | | Open_streams | 0 | | Open_table_definitions | 194 | | Open_tables | 437 | | Opened_files | 3770955 | | Opened_table_definitions | 0 | | Opened_tables | 0 | | Performance_schema_cond_classes_lost | 0 | | Performance_schema_cond_instances_lost | 0 | | Performance_schema_file_classes_lost | 0 | | Performance_schema_file_handles_lost | 0 | | Performance_schema_file_instances_lost | 0 | | Performance_schema_locker_lost | 0 | | Performance_schema_mutex_classes_lost | 0 | | Performance_schema_mutex_instances_lost | 0 | | Performance_schema_rwlock_classes_lost | 0 | | Performance_schema_rwlock_instances_lost | 0 | | Performance_schema_table_handles_lost | 0 | | Performance_schema_table_instances_lost | 0 | | Performance_schema_thread_classes_lost | 0 | | Performance_schema_thread_instances_lost | 0 | | Prepared_stmt_count | 0 | | Qcache_free_blocks | 0 | | Qcache_free_memory | 0 | | Qcache_hits | 0 | | Qcache_inserts | 0 | | Qcache_lowmem_prunes | 0 | | Qcache_not_cached | 0 | | Qcache_queries_in_cache | 0 | | Qcache_total_blocks | 0 | | Queries | 853253175 | | Questions | 147 | | Rpl_status | AUTH_MASTER | | Select_full_join | 0 | | Select_full_range_join | 0 | | Select_range | 0 | | Select_range_check | 0 | | Select_scan | 4 | | Slave_heartbeat_period | 1800.000 | | Slave_open_temp_tables | 0 | | Slave_received_heartbeats | 0 | | Slave_retried_transactions | 0 | | Slave_running | OFF | | Slow_launch_threads | 0 | | Slow_queries | 0 | | Sort_merge_passes | 0 | | Sort_range | 0 | | Sort_rows | 0 | | Sort_scan | 0 | | Ssl_accept_renegotiates | 0 | | Ssl_accepts | 0 | | Ssl_callback_cache_hits | 0 | | Ssl_cipher | | | Ssl_cipher_list | | | Ssl_client_connects | 0 | | Ssl_connect_renegotiates | 0 | | Ssl_ctx_verify_depth | 0 | | Ssl_ctx_verify_mode | 0 | | Ssl_default_timeout | 0 | | Ssl_finished_accepts | 0 | | Ssl_finished_connects | 0 | | Ssl_session_cache_hits | 0 | | Ssl_session_cache_misses | 0 | | Ssl_session_cache_mode | NONE | | Ssl_session_cache_overflows | 0 | | Ssl_session_cache_size | 0 | | Ssl_session_cache_timeouts | 0 | | Ssl_sessions_reused | 0 | | Ssl_used_session_cache_entries | 0 | | Ssl_verify_depth | 0 | | Ssl_verify_mode | 0 | | Ssl_version | | | Table_locks_immediate | 448927156 | | Table_locks_waited | 0 | | Tc_log_max_pages_used | 0 | | Tc_log_page_size | 0 | | Tc_log_page_waits | 1 | | Threads_cached | 63 | | Threads_connected | 50 | | Threads_created | 113 | | Threads_running | 3 | | Uptime | 13567631 | | Uptime_since_flush_status | 13567631 | | binlog_commits | 357394587 | | binlog_group_commits | 356597644 | +------------------------------------------+---------------+ 370 rows in set (0.00 sec)