1、查询是否锁表

show open tables where in_use>0;

2、查询进程

show processlist

查询到相对应的进程，然后 kill id

3、查看正在锁的事务

select * from information_schema.innodb_locks; 

4、查看等待锁的事务

select * from information_schema.innodb_lock_waits;