主要是两个命令:
show processlist;
和
kill id,id...;
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mysql使用myisam的时候锁表比较多,尤其有慢查询的时候,造成死锁.这时需要手动kill掉locked的process.使他释放.
(以前我都是重起服务)惭愧啊
演示:(id 7是我用python 来连过来的一个会话,虽然是状态是sleep,为了演示,干掉他)
mysql> show processlist;
+----+------+-----------+------+---------+------+-------+------------------+
¦ Id ¦ User ¦ Host ¦ db ¦ Command ¦ Time ¦ State ¦ Info ¦
+----+------+-----------+------+---------+------+-------+------------------+
¦ 7 ¦ root ¦ localhost ¦ yy ¦ Sleep ¦ 154 ¦ ¦ NULL ¦
¦ 8 ¦ root ¦ localhost ¦ NULL ¦ Query ¦ 0 ¦ NULL ¦ show processlist ¦
+----+------+-----------+------+---------+------+-------+------------------+
2 rows in set (0.00 sec)
mysql> kill 7
-> ;
mysql> show processlist;
+----+------+-----------+------+---------+------+-------+------------------+
¦ Id ¦ User ¦ Host ¦ db ¦ Command ¦ Time ¦ State ¦ Info ¦
+----+------+-----------+------+---------+------+-------+------------------+
¦ 8 ¦ root ¦ localhost ¦ NULL ¦ Query ¦ 0 ¦ NULL ¦ show processlist ¦
+----+------+-----------+------+---------+------+-------+------------------+
1 row in set (0.00 sec)