MySQL状态变量详解

Posted 2021-02-02 jkin

MySQL状态变量详解

mysql的状态变量（status variables）记录的mysql服务器的运行状态信息。查看语法如下：

SHOW [GLOBAL | SESSION] STATUS;

SHOW STATUS命令会显示每个服务器变量的名字和值，状态变量是只读的。我们可以在MySQL客户端下运行SHOW STATUS或者在命令行运用mysqladmin extended-status来查看这

些变量。如果使用SQL命令，可以使用LIKE或者WHERE来限制结果。LIKE可以对变量名做标准模式匹配。

SHOW STATUS中混杂了全局和会话变量，其中许多变量有双重域：既是全局变量，也是会话变量，有相同的名字。如果只需要看全局变量，需要改为SHOW GLOBAL STATUS查看

变量详解：

变量名	值	变量说明
Aborted_clients	1	由于客户端未正确关闭连接而终止的连接数
Aborted_connects	1	尝试连接到MySQL服务器失败的次数
Binlog_cache_disk_use	0	使用临时二进制日志缓存但超过binlog_cache_size值并使用临时文件存储来自事务的语句的事务数
Binlog_cache_use	0	使用二进制日志缓存的事务数
Binlog_stmt_cache_disk_use	0	使用二进制日志语句缓存但超过的非事务语句数binlog_stmt_cache_size的值，并使用临时文件存储这些语句
Binlog_stmt_cache_use	0	使用二进制日志语句缓存的非事务性语句数
Bytes_received	239	从所有客户端接收的字节数
Bytes_sent	176	发送到所有客户端的字节数
Com_admin_commands	0	admin语句计数
Com_assign_to_keycache	0	缓存索引语句计数
Com_alter_db	0	alter database语句计数
Com_alter_db_upgrade	0	alter database ... upgrade data directory name 语句计数
Com_alter_event	0	alter event语句计数
Com_alter_function	0	alter function语句计数
Com_alter_instance	0
Com_alter_procedure	0	alter procedure语句计数
Com_alter_server	0	alter server语句计数
Com_alter_table	0	alter table语句计数
Com_alter_tablespace	0	alter tablespace语句计数
Com_alter_user	0	alter user语句计数
Com_analyze	0	analyze语句计数
Com_begin	0	begin语句计数
Com_binlog	0	binlog语句计数
Com_call_procedure	0	call procedure语句计数
Com_change_db	0	change database语句计数
Com_change_master	0	change master to语句计数
Com_change_repl_filter	0	change replication filter语句计数
Com_check	0	check语句计数
Com_checksum	0	checksum语句计数
Com_commit	0	commit语句计数
Com_create_db	0	create database语句计数
Com_create_event	0	create event语句计数
Com_create_function	0	create function语句计数
Com_create_index	0	create index语句计数
Com_create_procedure	0	create procudure语句计数
Com_create_server	0	create server语句计数
Com_create_table	0	create table语句计数
Com_create_trigger	0	create trigger语句计数
Com_create_udf	0	create udf语句计数
Com_create_user	0	create user语句计数
Com_create_view	0	create view语句计数
Com_dealloc_sql	0	deallocate prepare语句计数
Com_delete	0	delete语句计数
Com_delete_multi	0	multiple table delete语句计数
Com_do	0	do语句计数
Com_drop_db	0	drop database语句计数
Com_drop_event	0	drop event句计数
Com_drop_function	0	drop function语句计数
Com_drop_index	0	drop index语句计数
Com_drop_procedure	0	drop procedure语句计数
Com_drop_server	0	drop server语句计数
Com_drop_table	0	drop table语句计数
Com_drop_trigger	0	drop triger语句计数
Com_drop_user	0	drop user语句计数
Com_drop_view	0	drop view语句计数
Com_empty_query	0	empty语句计数
Com_execute_sql	0	execute语句计数
Com_explain_other	0	explain for connection语句计数
Com_flush	0	flush语句计数
Com_get_diagnostics	0	get diagnostics语句计数
Com_grant	0	grant语句计数
Com_ha_close	0	handler close语句计数
Com_ha_open	0	handler open语句计数
Com_ha_read	0	handler read语句计数
Com_help	0	help语句计数
Com_insert	0	insert语句计数
Com_insert_select	0	insert..select..语句计数
Com_install_plugin	0	install plugin语句计数
Com_kill	0	kill语句计数
Com_load	0	load语句计数
Com_lock_tables	0	lock tables语句计数
Com_optimize	0	optimize语句计数
Com_preload_keys	0	preload语句计数
Com_prepare_sql	0	prepare语句计数
Com_purge	0	purge语句计数
Com_purge_before_date	0	purge before date语句计数
Com_release_savepoint	0	release savepoint语句计数
Com_rename_table	0	rename table语句计数
Com_rename_user	0	rename user语句计数
Com_repair	0	repair语句计数
Com_replace	0	replace语句计数
Com_replace_select	0	replace select语句计数
Com_reset	0	reset语句计数
Com_resignal	0	resignal语句计数
Com_revoke	0	revoke语句计数
Com_revoke_all	0	revoke all语句计数
Com_rollback	0	rollback语句计数
Com_rollback_to_savepoint	0	rollback to savepoint语句计数
Com_savepoint	0	savepoint语句计数
Com_select	0	select语句计数
Com_set_option	0	set option语句计数
Com_signal	0	signal语句计数
Com_show_binlog_events	0	show binlog events语句计数
Com_show_binlogs	0	show binary logs语句计数
Com_show_charsets	0	show charset语句计数
Com_show_collations	0	show clooation语句计数
Com_show_create_db	0	show create database语句计数
Com_show_create_event	0	show create event语句计数
Com_show_create_func	0	show create function语句计数
Com_show_create_proc	0	show create procedure语句计数
Com_show_create_table	0	show create table语句计数
Com_show_create_trigger	0	show create trigger语句计数
Com_show_databases	0	show databases语句计数
Com_show_engine_logs	0	show engine logs语句计数
Com_show_engine_mutex	0	show engine mutex语句计数
Com_show_engine_status	0	show engine status语句计数
Com_show_events	0	show events语句计数
Com_show_errors	0	show errors语句计数
Com_show_fields	0	show fields语句计数
Com_show_function_code	0	show function code语句计数
Com_show_function_status	0	show function status语句计数
Com_show_grants	0	show grant语句计数
Com_show_keys	0	show key语句计数
Com_show_master_status	0	show master status语句计数
Com_show_open_tables	0	show open tables语句计数
Com_show_plugins	0	show plugin语句计数
Com_show_privileges	0	show privileges语句计数
Com_show_procedure_code	0	show proceudre code语句计数
Com_show_procedure_status	0	show procedure status语句计数
Com_show_processlist	0	show processlist语句计数
Com_show_profile	0	show profile语句计数
Com_show_profiles	0	show profiles语句计数
Com_show_relaylog_events	0	show relaylog events语句计数
Com_show_slave_hosts	0	show slave hosts语句计数
Com_show_slave_status	0	show slave status语句计数
Com_show_status	0	show status语句计数
Com_show_storage_engines	0	show storage engines(show engines)语句计数
Com_show_table_status	0	show table status语句计数
Com_show_tables	0	show tables语句计数
Com_show_triggers	0	show triggers语句计数
Com_show_variables	0	show variables语句计数
Com_show_warnings	0	show warnings语句计数
Com_show_create_user	0	show create user语句计数
Com_shutdown	0	shutdown语句计数
Com_slave_start	0	start slave语句计数
Com_slave_stop	0	stop slave语句计数
Com_group_replication_start	0	start group_replication语句计数
Com_group_replication_stop	0	stop group_replication语句计数
Com_stmt_execute	0	statement execute语句计数
Com_stmt_close	0	statement close语句计数
Com_stmt_fetch	0	statement fetch语句计数
Com_stmt_prepare	0	statement prepare语句计数
Com_stmt_reset	0	statement reset语句计数
Com_stmt_send_long_data	0	statement execute语句计数
Com_truncate	0	statement send long data语句计数
Com_uninstall_plugin	0	uninstall plugin语句计数
Com_unlock_tables	0	unlock tables语句计数
Com_update	0	update语句计数
Com_update_multi	0	multiple语句计数
Com_xa_commit	0	xa commit语句计数
Com_xa_end	0	xa end语句计数
Com_xa_prepare	0	xa prepare语句计数
Com_xa_recover	0	xa recover语句计数
Com_xa_rollback	0	xa rollback语句计数
Com_xa_start	0	xa start语句计数
Com_stmt_reprepare	0	statement reprepare语句计数
Compression	OFF
Connection_errors_accept	0
Connection_errors_internal	0
Connection_errors_max_connections	0
Connection_errors_peer_address	0
Connection_errors_select	0
Connection_errors_tcpwrap	0
Connections	34
Created_tmp_disk_tables	0
Created_tmp_files	5
Created_tmp_tables	0
Delayed_errors	0
Delayed_insert_threads	0
Delayed_writes	0
Flush_commands	1
Handler_commit	0
Handler_delete	0
Handler_discover	0
Handler_external_lock	0
Handler_mrr_init	0
Handler_prepare	0
Handler_read_first	0
Handler_read_key	0
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	0
Handler_rollback	0
Handler_savepoint	0
Handler_savepoint	0
Handler_update	0
Handler_write	0
Innodb_buffer_pool_dump_status	Dumping of buffer pol not started
Innodb_buffer_pool_load_status	Buffer pool(s) loadcompleted at 181221 13:15:19
Innodb_buffer_pool_resize_status
Innodb_buffer_pool_pages_data	417
Innodb_buffer_pool_bytes_data	6832128
Innodb_buffer_pool_pages_dirty	0
Innodb_buffer_pool_bytes_dirty	0
Innodb_buffer_pool_pages_flushed	39
Innodb_buffer_pool_pages_free	7775
Innodb_buffer_pool_pages_misc	0
Innodb_buffer_pool_pages_total	8192
Innodb_buffer_pool_read_ahead_rnd	0
Innodb_buffer_pool_read_ahead	0
Innodb_buffer_pool_read_ahead_evicted	0
Innodb_buffer_pool_read_requests	1722
Innodb_buffer_pool_reads	383
Innodb_buffer_pool_wait_free	0
Innodb_buffer_pool_write_requests	345
Innodb_data_fsyncs	7
Innodb_data_pending_fsyncs	0
Innodb_data_pending_reads	0
Innodb_data_pending_writes	0
Innodb_data_read	7459328
Innodb_data_reads	508
Innodb_data_writes	56
Innodb_data_written	673792
Innodb_dblwr_pages_written	2
Innodb_dblwr_writes	1
Innodb_log_waits	0
Innodb_log_write_requests	0
Innodb_log_writes	2
Innodb_os_log_fsyncs	4
Innodb_os_log_pending_fsyncs	0
Innodb_os_log_pending_writes	0
Innodb_os_log_written	1024
Innodb_page_size	16384
Innodb_pages_created	35
Innodb_pages_read	382
Innodb_pages_written	39
Innodb_row_lock_current_waits	0
Innodb_row_lock_time	0
Innodb_row_lock_time_avg	0
Innodb_row_lock_time_max	0
Innodb_row_lock_waits	0
Innodb_rows_deleted	0
Innodb_rows_inserted	45
Innodb_rows_read	54
Innodb_rows_updated	0
Innodb_num_open_files	26
Innodb_truncated_status_writes	0
Innodb_available_undo_logs	128
Key_blocks_not_flushed	0
Key_blocks_unused	6693
Key_blocks_used	5
Key_read_requests	8
Key_reads	5
Key_write_requests	0
Key_writes	0
Last_query_cost	0.000000
Last_query_partial_plans	0
Locked_connects	0
Max_execution_time_exceeded	0
Max_execution_time_set	0
Max_execution_time_set_failed	0
Max_used_connections	2
Max_used_connections_time	2018-12-22 10:27:47
Not_flushed_delayed_rows	0
Ongoing_anonymous_transaction_count	0
Open_files	20
Open_streams	0
Open_table_definitions	113
Open_tables	121
Opened_files	162
Opened_table_definitions	0
Opened_tables	0
Performance_schema_accounts_lost	0
Performance_schema_cond_classes_lost	0
Performance_schema_cond_instances_lost	0
Performance_schema_digest_lost	0
Performance_schema_file_classes_lost	0
Performance_schema_file_handles_lost	0
Performance_schema_file_instances_lost	0
Performance_schema_hosts_lost	0
Performance_schema_index_stat_lost	0
Performance_schema_locker_lost	0
Performance_schema_memory_classes_lost	0
Performance_schema_metadata_lock_lost	0
Performance_schema_mutex_classes_lost	0
Performance_schema_mutex_instances_lost	0
Performance_schema_nested_statement_lost	0
Performance_schema_prepared_statements_lost	0
Performance_schema_program_lost	0
Performance_schema_rwlock_classes_lost	0
Performance_schema_rwlock_instances_lost	0
Performance_schema_session_connect_attrs_lost	0
Performance_schema_socket_classes_lost	0
Performance_schema_socket_instances_lost	0
Performance_schema_stage_classes_lost	0
Performance_schema_statement_classes_lost	0
Performance_schema_table_handles_lost	0
Performance_schema_table_instances_lost	0
Performance_schema_table_lock_stat_lost	0
Performance_schema_thread_classes_lost	0
Performance_schema_thread_instances_lost	0
Performance_schema_users_lost	0
Prepared_stmt_count	0
Qcache_free_blocks	1
Qcache_free_memory	1031832
Qcache_hits	0
Qcache_inserts	0
Qcache_lowmem_prunes	0
Qcache_not_cached	26
Qcache_queries_in_cache	0
Qcache_total_blocks	1
Queries	127
Questions	2
Select_full_join	0
Select_full_range_join	0
Select_range	0
Select_range_check	0
Select_scan	0
Slave_open_temp_tables	0
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_server_not_after
Ssl_server_not_before
Ssl_session_cache_hits	0
Ssl_session_cache_misses	0
Ssl_session_cache_mode
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	143
Table_locks_waited	0
Table_open_cache_hits	0
Table_open_cache_misses	0
Table_open_cache_overflows	0
Tc_log_max_pages_used	0
Tc_log_page_size	0
Tc_log_page_waits	0
Threads_cached	1
Threads_connected	1
Threads_created	2
Threads_running	1
Uptime	114789
Uptime_since_flush_status	114789