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show processlist;
kill 6924
show full processlist; #列出全部进程
select * from information_schema.PROCESSLIST t;
kill 6911
SELECT * FROM information_schema.innodb_trx ORDER BY trx_started ;
SELECT * FROM information_schema.innodb_locks;
SELECT * FROM information_schema.innodb_trx t where t.trx_state = 'LOCK WAIT';
select * from information_schema.PROCESSLIST t where t.id = {lock_trx_id}
#状态一直在休眠，关闭事件调节器[7]：
SET GLOBAL event_scheduler = OFF;
#查看是否开启定时器
SHOW VARIABLES LIKE 'event_scheduler'; SHOW VARIABLES LIKE
'event_scheduler'; #查看是否开启定时器
MYSQL 解锁与锁表和批解锁
第一种
show processlist;
找到锁进程，kill id ;
第二种
mysql>UNLOCK TABLES;
锁表
锁定数据表，避免在备份过程中，表被更新
mysql>LOCK TABLES tbl_name READ;
为表增加一个写锁定：
mysql>LOCK TABLES tbl_name WRITE;
查询是否锁表
show OPEN TABLES where In_use > 0;
SHOW OPEN TABLES;
// 解锁
UNLOCK TABLES;
查看表的状态
SHOW STATUS LIKE 'table%';
SHOW STATUS LIKE 'innodb_row_lock%';
第三种
SELECT concat('KILL ',id,';') FROM information_schema.processlist WHERE
user='root';
KILL 755;
KILL 756;