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mysql查看被锁住的表
* 查询是否锁表 show OPEN TABLES where In_use > 0;
* 查看所有进程
MySQL:
show processlist;
mariabd:
show full processlist;
查询到相对应的进程===然后 kill id
* 杀掉指定mysql连接的进程号 kill $pid
*
查看当前的事务
SELECT * FROM INFORMATION_SCHEMA.INNODB_TRX;
* 查看正在锁的事务 SELECT * FROM INFORMATION_SCHEMA.INNODB_LOCKS;
* 查看等待锁的事务 SELECT * FROM INFORMATION_SCHEMA.INNODB_LOCK_WAITS;
* 查看innodb引擎的运行时信息 show engine innodb status\G;
查看造成死锁的sql语句,分析索引情况,然后优化sql语句;
* 查看服务器状态 show status like '%lock%';
* 查看超时时间: show variables like '%timeout%';