Home Database Mysql Tutorial mysql中Table is read only的解决方法小结_MySQL

mysql中Table is read only的解决方法小结_MySQL

Jun 01, 2016 pm 01:23 PM
linux database

bitsCN.com 如果是使用中的数据库突然出现些类问题
在Linux下面执行下面命令就可以了,当然你要找到你的mysql目录

linux中

/usr/local/mysql/bin/mysqladmin -u root -p flush-tables

windows中
可以在cmd中执行lush-tables
也可以在phpmyadmin 直利用修复表进行修改

如果是导入还原数据
,所以将该数据库文件夹下面所有表文件chmod成777,chown成”_mysql”,但这次问题更严重,drupal里面现实table crached。没办法,马上Google,发现其实解决起来挺容易的。
首先,找到mysqladmin所在位置,一般都在mysql/bin下面,然后运行一下命令:

./mysqladmin -u root -p flush-tables

之后输入root账号的密码,马上就好了,没有任何任何提示,重新打开drupal,一切正常。
通过这次,也找到了数据库文件的正确权限设置:data下面数据库文件夹700,表文件660,所有文件都应owned by mysql。

以下也是从window数据库转移到linux服务器出的问题

一个Discuz论坛,原来架在windows下,用的是GBK编码,MYSQL版本是5.0的。
现在需要转移到Linux下,我本来建议用mysqldump导出的方法,但同事希望直接用data目录下的数据库目录。

那就先用移目录的方式试下,在新服务器创建数据库,然后将旧的目录移过来。

在mysql中,Select之类的都正常,但在网页程序中提示:Table 'cdb_posts' is read only

给数据库目录的所属用户和组改为mysql,并加上777的权限,还是一样提示。

程序中使用root连接,也是一样的提示。

想用myisamchk来检查一下,也提示read only。

最终在这里找到了解决方法:http://www.mysqltalk.org/re-the-table-is-read-only-vt154092.html

引用
I just encountered a similar problem on one of my production servers
this morning. (I'm still investigating the cause.) After doing a
quick bit of Google-searching, this solved my problem:

mysqladmin -u -p flush-tables

By the way: All directories in /var/lib/mysql should have 700
permissions (owned my the mysql user) and everything within those
directories should be 660 (owned by the mysql user and mysql group).

运行flush-tables后,read only问题解决:)

然后发现数据结构和内容还是有问题,用myisamchk查错无效,后来用mysqldump导,不过也还是碰到了一大堆问题,由于要转的数据库挺大,化了很长时间,最终没有继续下去。
了解了一些知识点,记录一下:

就是mysql5导出的有default-charact的设置,mysql4不支持,需要加skip-opt参数,如:
mysqldump -uroot -p --default-character-set=gbk -skip-opt databse > hx.sql
参考文章:Mysql 数据库字符集转换

最后找了台mysql5的服务器,用mysqldump导出,mysql导入,一次成功!
发现用mysqldump导出一个表,300w多条记录,用了才4分多钟,每秒处理1w多记录,快啊!导入时,差不多用了十几分钟,每秒导入几千条也很快了:)bitsCN.com

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