MySQL show status关键结果释义和提升性能意见有哪些
发布时间：2021-12-20 10:45:43 所属栏目：通讯 来源：互联网
导读：MySQL show status关键结果释义和提升性能建议有哪些，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。 例子: show status结果如下: mysql show status; +---------------------------------
|
MySQL show status关键结果释义和提升性能建议有哪些，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。 例子: show status结果如下: mysql> show status; +-----------------------------------------------+---------------+ | Variable_name | Value | +-----------------------------------------------+---------------+ | Aborted_clients | 3353 | | Aborted_connects | 14 | | Binlog_cache_disk_use | 10751 | | Binlog_cache_use | 10079768 | | Binlog_stmt_cache_disk_use | 0 | | Binlog_stmt_cache_use | 46 | | Bytes_received | 888 | | Bytes_sent | 79686 | | 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_alter_user | 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_get_diagnostics | 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 | 1 | | Com_set_option | 0 | | Com_signal | 0 | | Com_show_binlog_events | 0 | | Com_show_binlogs | 0 | | Com_show_charsets | 0 | | Com_show_collations | 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 | 0 | | 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 | 0 | | Com_show_function_code | 0 | | Com_show_function_status | 0 | | Com_show_grants | 0 | | Com_show_keys | 0 | | Com_show_master_status | 0 | | Com_show_open_tables | 1 | | Com_show_plugins | 0 | | Com_show_privileges | 0 | | Com_show_procedure_code | 0 | | Com_show_procedure_status | 0 | | Com_show_processlist | 2 | | Com_show_profile | 0 | | Com_show_profiles | 0 | | Com_show_relaylog_events | 0 | | Com_show_slave_hosts | 0 | | Com_show_slave_status | 0 | | Com_show_status | 11 | | Com_show_storage_engines | 0 | | Com_show_table_status | 0 | | Com_show_tables | 0 | | Com_show_triggers | 0 | | Com_show_variables | 5 | | 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 | | 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 | 711349 | | Created_tmp_disk_tables | 0 | | Created_tmp_files | 1052 | | Created_tmp_tables | 6 | | 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 | 868 | | Handler_rollback | 0 | | Handler_savepoint | 0 | | Handler_savepoint_rollback | 0 | | Handler_update | 0 | | Handler_write | 862 | | Innodb_buffer_pool_dump_status | not started | | Innodb_buffer_pool_load_status | not started | | Innodb_buffer_pool_pages_data | 2559033 | | Innodb_buffer_pool_bytes_data | 41927196672 | | Innodb_buffer_pool_pages_dirty | 1682 | | Innodb_buffer_pool_bytes_dirty | 27557888 | | Innodb_buffer_pool_pages_flushed | 18146851 | | Innodb_buffer_pool_pages_free | 8201 | | Innodb_buffer_pool_pages_misc | 54198 | | Innodb_buffer_pool_pages_total | 2621432 | | Innodb_buffer_pool_read_ahead_rnd | 0 | | Innodb_buffer_pool_read_ahead | 14299811 | | Innodb_buffer_pool_read_ahead_evicted | 580 | | Innodb_buffer_pool_read_requests | 1860737979861 | | Innodb_buffer_pool_reads | 6326772 | | Innodb_buffer_pool_wait_free | 0 | | Innodb_buffer_pool_write_requests | 363623332 | | Innodb_data_fsyncs | 15016048 | | Innodb_data_pending_fsyncs | 1 | | Innodb_data_pending_reads | 0 | | Innodb_data_pending_writes | 0 | | Innodb_data_read | 338241392640 | | Innodb_data_reads | 20647009 | | Innodb_data_writes | 28867196 | | Innodb_data_written | 665827024896 | | Innodb_dblwr_pages_written | 18146851 | | Innodb_dblwr_writes | 3470670 | | Innodb_have_atomic_builtins | ON | | Innodb_log_waits | 23 | | Innodb_log_write_requests | 164460745 | | Innodb_log_writes | 7043515 | | Innodb_os_log_fsyncs | 7225284 | | Innodb_os_log_pending_fsyncs | 1 | | Innodb_os_log_pending_writes | 0 | | Innodb_os_log_written | 71105871872 | | Innodb_page_size | 16384 | | Innodb_pages_created | 1429908 | | Innodb_pages_read | 20644117 | | Innodb_pages_written | 18146851 | | Innodb_row_lock_current_waits | 11 | | Innodb_row_lock_time | 1639372785 | | Innodb_row_lock_time_avg | 1540 | | Innodb_row_lock_time_max | 51737 | | Innodb_row_lock_waits | 1064015 | | Innodb_rows_deleted | 489355 | | Innodb_rows_inserted | 23323344 | | Innodb_rows_read | 2231512760378 | | Innodb_rows_updated | 71091492 | | Innodb_num_open_files | 1044 | | Innodb_truncated_status_writes | 0 | | Innodb_available_undo_logs | 128 | | Key_blocks_not_flushed | 0 | | Key_blocks_unused | 6696 | | Key_blocks_used | 6698 | | Key_read_requests | 4852138201 | | Key_reads | 85481134 | | Key_write_requests | 1285475383 | | Key_writes | 110483395 | | Last_query_cost | 10.499000 | | Last_query_partial_plans | 1 | | Max_used_connections | 294 | | Not_flushed_delayed_rows | 0 | | Open_files | 51 | | Open_streams | 0 | | Open_table_definitions | 732 | | Open_tables | 1842 | | Opened_files | 1821736 | | 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_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_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_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 | 1031352 | | Qcache_hits | 0 | | Qcache_inserts | 0 | | Qcache_lowmem_prunes | 0 | | Qcache_not_cached | 188110198 | | Qcache_queries_in_cache | 0 | | Qcache_total_blocks | 1 | | Queries | 1116883223 | | Questions | 20 | | Select_full_join | 0 | | Select_full_range_join | 0 | | Select_range | 0 | | Select_range_check | 0 | | Select_scan | 6 | | Slave_heartbeat_period | 0.000 | | Slave_last_heartbeat | | | 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_server_not_after | | | Ssl_server_not_before | | | 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 | 114434187 | | 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 | 15 | | Threads_connected | 128 | | Threads_created | 1299 | | Threads_running | 22 | | Uptime | 753095 | | Uptime_since_flush_status | 753095 | +-----------------------------------------------+---------------+ 341 rows in set (0.00 sec) Aborted_clients 由于客户没有正确关闭连接已经死掉，已经放弃的连接数量。 Aborted_connects 尝试已经失败的MySQL服务器的连接的次数。 Connections 试图连接MySQL服务器的次数。 Created_tmp_tables 当执行语句时，已经被创造了的隐含临时表的数量。 Delayed_insert_threads 正在使用的延迟插入处理器线程的数量。 Delayed_writes 用INSERT DELAYED写入的行数。 Delayed_errors 用INSERT DELAYED写入的发生某些错误(可能重复键值)的行数。 Flush_commands 执行FLUSH命令的次数。 Handler_delete 请求从一张表中删除行的次数。 Handler_read_first 请求读入表中第一行的次数。 Handler_read_key 请求数字基于键读行。 Handler_read_next 请求读入基于一个键的一行的次数。 Handler_read_rnd 请求读入基于一个固定位置的一行的次数。 Handler_update 请求更新表中一行的次数。 Handler_write 请求向表中插入一行的次数。 Key_blocks_used 用于关键字缓存的块的数量。 Key_read_requests 请求从缓存读入一个键值的次数。 Key_reads 从磁盘物理读入一个键值的次数。 Key_write_requests 请求将一个关键字块写入缓存次数。 Key_writes 将一个键值块物理写入磁盘的次数。 Max_used_connections 同时使用的连接的最大数目。 Not_flushed_key_blocks 在键缓存中已经改变但是还没被清空到磁盘上的键块。 Not_flushed_delayed_rows 在INSERT DELAY队列中等待写入的行的数量。 Open_tables 打开表的数量。 Open_files 打开文件的数量。 Open_streams 打开流的数量(主要用于日志记载） Opened_tables 已经打开的表的数量。 Questions 发往服务器的查询的数量。 Slow_queries 要花超过long_query_time时间的查询数量。 Threads_connected 当前打开的连接的数量。 Threads_running 不在睡眠的线程数量。 Uptime 服务器工作了多少秒。 提升性能的建议: 1.如果opened_tables太大,应该把参数文件my.cnf中的table_cache变大 2.如果Key_reads太大,则应该把my.cnf中key_buffer_size变大.可以用Key_reads/Key_read_requests计算出cache失败率,用于MyISAM引擎 3.如果Handler_read_rnd太大,则你写的SQL语句里很多查询都是要扫描整个表,而没有发挥索引的键的作用 4.如果Threads_created太大,就要增加参数文件my.cnf中thread_cache_size的值.可以用Threads_created/Connections计算cache命中率 5.如果Created_tmp_disk_tables太大,就要增加my.cnf中tmp_table_size的值,用基于内存的临时表代替基于磁盘的 看完上述内容，你们掌握MySQL show status关键结果释义和提升性能建议有哪些的方法了吗？如果还想学到更多技能或想了解更多相关内容，欢迎关注亿速云行业资讯频道，感谢各位的阅读！ （编辑：瑞安网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
