Mysql 常用操作（随时更新 自用）

每次用完就忘～

• 查看慢sql 相关配置：show variables like ‘slow%’;
• 慢sql 时间设置：set long_query_time=1; # 超过1毫秒就是慢sql
• 打开 optimizer_trace，只对本线程有效：set optimizer_trace=‘enabled=on’;
• 查看 optimizer_trace 输出：select * from information_schema.OPTIMIZER_TRACE\G
• 修改表名：alert table old_name rename as new_name;
• 查询 MDL 锁：select blocking_pid from sys.schema_table_lock_waits; 先设置 UPDATE performance_schema.setup_instruments SET ENABLED = 'YES', TIMED = 'YES' where name='wait/lock/metadata/sql/mdl';
• 查询行锁：select * from sys.innodb_lock_waits\G
• 查看binlog配置：show variables like ‘%log_bin%’; 开启binlog：[mysqld] 追加 log-bin=mysql-bin server-id=1
• 查看binlog文件列表：show binary logs;
• 查看正在写的binlog文件：show binlog events;
• 查看指定binlog文件：show binlog events in ‘mysql-bin.000001’;

本文地址：https://blog.csdn.net/qq_27007509/article/details/110953196