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批量杀死MySQL连接的四种方法详解_MySQL

WBOY
WBOYOriginal
2016-06-01 13:00:471158browse

方法一
  通过information_schema.processlist表中的连接信息生成需要处理掉的MySQL连接的语句临时文件,然后执行临时文件中生成的指令。

代码如下:


mysql> select concat('KILL ',id,';') from information_schema.processlist where user='root';
+------------------------+
| concat('KILL ',id,';') |
+------------------------+
| KILL 3101;             |
| KILL 2946;             |
+------------------------+
2 rows in set (0.00 sec)
 
mysql>select concat('KILL ',id,';') from information_schema.processlist where user='root' into outfile '/tmp/a.txt';
Query OK, 2 rows affected (0.00 sec)
 
mysql>source /tmp/a.txt;
Query OK, 0 rows affected (0.00 sec)

方法二
  杀掉当前所有的MySQL连接

代码如下:


mysqladmin -uroot -p processlist|awk -F "|" '{print $2}'|xargs -n 1 mysqladmin -uroot -p kill


杀掉指定用户运行的连接,这里为Mike

代码如下:


mysqladmin -uroot -p processlist|awk -F "|" '{if($3 == "Mike")print $2}'|xargs -n 1 mysqladmin -uroot -p kill


方法三
通过SHEL脚本实现

代码如下:


#杀掉锁定的MySQL连接
for id in `mysqladmin processlist|grep -i locked|awk '{print $1}'`
do
   mysqladmin kill ${id}
done


方法四
  通过Maatkit工具集中提供的mk-kill命令进行

代码如下:


#杀掉超过60秒的sql
mk-kill -busy-time 60 -kill
#如果你想先不杀,先看看有哪些sql运行超过60秒
mk-kill -busy-time 60 -print
#如果你想杀掉,同时输出杀掉了哪些进程
mk-kill -busy-time 60 -print –kill

mk-kill更多用法可参考:
http://www.maatkit.org/doc/mk-kill.html

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