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HomeDatabaseMysql TutorialMySQL修改tmpdir参数_MySQL

今天突然收到报警短信,说是/磁盘空间使用超过阀值。经查看,发现是有很多异常的SQL,执行不了,导致一直在处理,产生了临时占用了/tmp磁盘空间。

由于操作系统的/tmp空间有限,需要进行参数修改,将tmpdir的值路径进行修改。

mysql> show variables like 'tmpdir';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| tmpdir    | /tmp |
+---------------+-------+
1 row in set (0.00 sec)

mysql> set global tmpdir = '/Data/app/mysql5.6.25/mysqltmp';
ERROR 1238 (HY000): Variable 'tmpdir' is a read only variable

只能通过配置文件进行修改了。

重启mysql

mysql> show variables like 'tmpdir';
+---------------+--------------------------------+
| Variable_name | Value             |
+---------------+--------------------------------+
| tmpdir    | /mysql5.6/var/tmp |
+---------------+--------------------------------+
1 row in set (0.00 sec)

问一下:但是生产环境不能重启服务,这要怎么搞呢?

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