晕了,mysql 居然kill不掉,请问有人知道吗
发布网友
发布时间：2022-04-07 16:29
共3个回答
懂视网
时间：2022-04-07 20:51
RECORD LOCKS space id 122 page no 3 n bits 80 index `PRIMARY` of table `test`.`t` trx id 307463 lock_mode X
RECORD LOCKS space id 122 page no 4 n bits 80 index `idx_name` of table `test`.`t` trx id 307463 lock_mode X
RECORD LOCKS space id 122 page no 4 n bits 80 index `idx_name` of table `test`.`t` trx id 307463 lock_mode X locks gap before rec
mysql> show processlist; +------+------+---------------------+------+-------------+-------+-----------------------------------------------------------------------+------------------+-----------+---------------+ | Id | User | Host | db | Command | Time | State | Info | Rows_sent | Rows_examined | +------+------+---------------------+------+-------------+-------+-----------------------------------------------------------------------+------------------+-----------+---------------+ | 4256 | root | localhost | test | Sleep | 72573 | | NULL | 7 | 7 | | 4375 | repl | 172.16.52.131:49285 | NULL | Binlog Dump | 75947 | Master has sent all binlog to slave; waiting for binlog to be updated | NULL | 0 | 0 | | 5294 | root | localhost | test | Sleep | 72553 | | NULL | 0 | 0 | | 9060 | root | localhost | test | Query | 0 | init | show processlist | 0 | 0 | | 9289 | root | localhost | NULL | Sleep | 40 | | NULL | 0 | 0 | +------+------+---------------------+------+-------------+-------+-----------------------------------------------------------------------+------------------+-----------+---------------+ 5 rows in set (0.00 sec) |
mysql> select * from t; +----+----------+------+ | i | name | age | +----+----------+------+ | 1 | zhangsna | 20 | | 2 | zhangsna | 20 | | 3 | c | 23 | | 4 | c | 23 | | 5 | e | NULL | | 6 | f | NULL | | 19 | xiaoming | 23 | +----+----------+------+ 7 rows in set (0.00 sec) |
判断：
通过innodb status发现对t表上了表锁：TABLE LOCK table `test`.`t` trx id 307463 lock mode IX
通过select * from t发现该表有7行：7 rows in set (0.00 sec)
通过show processlist发现有一个会话的Rows_sent | Rows_examined为7 7 ，ID为4526
通过判断kill掉id为4526会话：
mysql> kill 4256; Query OK, 0 rows affected (0.00 sec) |
在执行delete操作，顺利执行：
mysql> delete from t; Query OK, 7 rows affected (0.01 sec) |
本文出自 “浮生凤年” 博客，请务必保留此出处http://liuzhanbin.blog.51cto.com/10060150/1647320
MySQL锁检测-kill
标签：锁
热心网友
时间：2022-04-07 17:59
你是不是用mysqld_safe起的mysql？这是个守护进程，用它起数据库的话，直接kill它会检测到数据库非正常关闭，会自动尝试起数据库。你可以选择先kill掉mysqld_safe的进程然后再kill mysql；或者使用这个命令：kill -9 `ps -ef | grep 'mysqld' | grep -v grep|awk '{print $2}'`
当然，最好还是用mysqladmin -h127.0.0.1 -uroot -p shutdown来正常关闭mysql。
热心网友
时间：2022-04-07 19:17
