MySQL主从状态检查的实现
(编辑:jimmy 日期: 2024/11/15 浏览:3 次 )
1、查看A、B数据库同步状态
输入以下命令,会出来很多信息,但是主要看Slave_IO_Running与Slave_SQL_Running这两个字段都显示yes就行了。
MySQL> show slave status\G;
2、查看A、B服务器的同步线程状态
输入以下命令,
MySQL > show processlist\G
若命令窗口有下图的三个线程,则证明配置成功,若缺少任何一个线程,请重启主、备两台机器的MySql服务,然后再在MySql命令窗口中输入上述命令查看是否有下图标注的三个线程。若没有这三个线程,请重新检查配置是否正确。
注意:主备服务器的MySql进程必须都有这三个线程才证明配置成功!
mysql> show processlist\G; *************************** 1. row *************************** ***省略*** *************************** 2. row *************************** Id: 22 User: system user Host: connecting host db: NULL Command: Connect Time: 938775 State: Waiting for master to send event Info: NULL *************************** 3. row *************************** Id: 23 User: system user Host: db: NULL Command: Query Time: 748608 State: Slave has read all relay log; waiting for more updates Info: NULL *************************** 4. row *************************** Id: 3691 User: slave Host: 1.2.3.3:54244 db: NULL Command: Binlog Dump Time: 70515 State: Master has sent all binlog to slave; waiting for more updates Info: NULL
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