在MySQL中检查读写比率的命令？
要检查读写比率，您需要使用SHOWSTATUS命令。这将给出所有比率。
情况1-获取读写比率的语法如下-
SHOW STATUS LIKE ‘Com_%’;
情况2-如果要插入，更新，选择和删除比率，请使用以下语法-
SHOW GLOBAL STATUS WHERE Variable_name = 'Com_insert' OR Variable_name = 'Com_select' OR Variable_name = 'Com_Update' OR Variable_name = 'Com_delete';
这里不需要对以上语法进行任何更改。查询如下-
mysql> SHOW GLOBAL STATUS WHERE Variable_name = 'Com_insert' OR Variable_name = 'Com_select' OR -> Variable_name = 'Com_Update' OR Variable_name = 'Com_delete';
以下是输出-
+---------------+-------+ | Variable_name | Value | +---------------+-------+ | Com_delete | 5 | | Com_insert | 340 | | Com_select | 286 | | Com_update | 13 | +---------------+-------+ 4 rows in set (0.00 sec)
如果您需要所有信息，请使用上面的语法。查询如下-
mysql> Show status like 'Com_%';
以下是输出-
+-------------------------------------+-------+ | Variable_name | Value | +-------------------------------------+-------+ | Com_admin_commands | 0 | | Com_assign_to_keycache | 0 | | Com_alter_db | 0 | | Com_alter_event | 0 | | Com_alter_function | 0 | | Com_alter_instance | 0 | | Com_alter_procedure | 0 | | Com_alter_resource_group | 0 | | Com_alter_server | 0 | | Com_alter_table | 0 | | Com_alter_tablespace | 0 | | Com_alter_user | 0 | | Com_alter_user_default_role | 0 | | Com_analyze | 0 | | Com_begin | 0 | | Com_binlog | 0 | | Com_call_procedure | 0 | | Com_change_db | 1 | | Com_change_master | 0 | | Com_change_repl_filter | 0 | | Com_check | 0 | | Com_checksum | 0 | | Com_clone | 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_role | 0 | | Com_create_server | 0 | | Com_create_table | 6 | | Com_create_resource_group | 0 | | Com_create_trigger | 0 | | Com_create_udf | 0 | | Com_create_user | 0 | | Com_create_view | 0 | | Com_create_spatial_reference_system | 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_resource_group | 0 | | Com_drop_role | 0 | | Com_drop_server | 0 | | Com_drop_spatial_reference_system | 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_explain_other | 0 | | Com_flush | 0 | | Com_get_diagnostics | 0 | | Com_grant | 0 | | Com_grant_roles | 0 | | Com_ha_close | 0 | | Com_ha_open | 0 | | Com_ha_read | 0 | | Com_help | 0 | | Com_import | 0 | | Com_insert | 42 | | Com_insert_select | 0 | | Com_install_component | 0 | | Com_install_plugin | 0 | | Com_kill | 0 | | Com_load | 0 | | Com_lock_instance | 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_restart | 0 | | Com_revoke | 0 | | Com_revoke_all | 0 | | Com_revoke_roles | 0 | | Com_rollback | 0 | | Com_rollback_to_savepoint | 0 | | Com_savepoint | 0 | | Com_select | 27 | | Com_set_option | 3 | | Com_set_password | 0 | | Com_set_resource_group | 0 | | Com_set_role | 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 | 0 | | Com_show_plugins | 0 | | Com_show_privileges | 0 | | Com_show_procedure_code | 0 | | Com_show_procedure_status | 0 | | Com_show_processlist | 0 | | 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 | 3 | | Com_show_storage_engines | 0 | | Com_show_table_status | 0 | | Com_show_tables | 0 | | Com_show_triggers | 0 | | Com_show_variables | 2 | | Com_show_warnings | 0 | | Com_show_create_user | 0 | | Com_shutdown | 0 | | Com_slave_start | 0 | | Com_slave_stop | 0 | | Com_group_replication_start | 0 | | Com_group_replication_stop | 0 | | Com_stmt_execute | 0 | | Com_stmt_close | 0 | | Com_stmt_fetch | 0 | | Com_stmt_prepare | 0 | | Com_stmt_reset | 0 | | Com_stmt_send_long_data | 0 | | Com_truncate | 0 | | Com_uninstall_component | 0 | | Com_uninstall_plugin | 0 | | Com_unlock_instance | 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 | | Com_stmt_reprepare | 0 | | Compression | OFF | +-------------------------------------+-------+ 168 rows in set (0.04 sec)