Home Database Mysql Tutorial 如何修复损坏的MySQL数据表

如何修复损坏的MySQL数据表

Jun 07, 2016 pm 05:10 PM
database

于断电或非正常关机而导致MySQL数据库出现错误是非常常见的问题。有两种方法,一种方法使用mysql的check table和repair table 的

于断电或非正常关机而导致MySQL数据库出现错误是非常常见的问题。有两种方法,一种方法使用mysql的check table和repair table 的sql语句,另一种方法是使用MySQL提供的多个myisamchk, isamchk数据检测恢复工具。前者使用起来比较简便。推荐使用。

1. check table 和 repair table
登陆mysql 终端:
mysql -uxxxxx -p dbname
> check table tabTest;
如果出现的结果说Status是OK,则不用修复,如果有Error,可以用:
> repair table tabTest;
进行修复,修复之后可以在用check table命令来进行检查。在新版本的phpMyAdmin里面也可以使用check/repair的功能。

2. myisamchk, isamchk
其中myisamchk适用于MYISAM类型的数据表,而isamchk适用于ISAM类型的数据表。这两条命令的主要参数相同,一般新的系统都使用MYISAM作为缺省的数据表类型,这里以myisamchk为例子进行说明。当发现某个数据表出现问题时可以使用:

myisamchk tablename.MYI

进行检测,如果需要修复的话,可以使用:

myisamchk -of tablename.MYI

关于myisamchk的详细参数说明,可以参见它的使用帮助。需要注意的时在进行修改时必须确保MySQL服务器没有访问这个数据表,保险的情况下是最好在进行检测时把MySQL服务器Shutdown掉。

-----------------------------

另外可以把下面的命令放在你的rc.local里面启动MySQL服务器前:

[ -x /tmp/mysql.sock ] && /pathtochk/myisamchk -of /DATA_DIR/*/*.MYI

其中的/tmp/mysql.sock是MySQL监听的Sock文件位置,对于使用RPM安装的用户应该是/var/lib/mysql/mysql.sock,对于使用源码安装则是/tmp/mysql.sock可以根据自己的实际情况进行变更,而pathtochk则是myisamchk所在的位置,DATA_DIR是你的MySQL数据库存放的位置。

需要注意的时,,如果你打算把这条命令放在你的rc.local里面,必须确认在执行这条指令时MySQL服务器必须没有启动!

检测修复所有数据库(表)
mysqlcheck -A -o -r -p
---------------------------------------------------------------------------------


示例:
mysql> check table tabFTPAccountInstances;

linux

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