MySQL从MyISAM转换成InnoDB错误与常用解决办法

很文博客hinven.com 2022年1月15日08:05:50数据库评论1934561字阅读模式

由于一些程序的要求,需要MyISAM数据引擎或InnoDB,下面是具体的解决方法,经测试偶尔会出现一些问题。

原来自己用的是为了装的, 所以在设置database usage(如下图1)的时候按照discuz官方的建议,选的都是Non-Transactional Database Only(只支持MyISAM数据引擎的非事务数据库),用MyISAM数据库,还没涉及到需要InnoDB,因此打算直接不加载INNODB引擎。后来在做WordPress,一开始还不知道原来WordPress用的是InnoDB数据引擎,于是在原来的数据库里面就建了一个数据库,一开始也没发觉问题,安装,导入sql,都没问题,当时也没多想。直到这几天因为又要装多一个WordPress,用phpmyadmin访问数据库多一点,问题来了。老是一访问WordPress的数据库,就弹出错误提示“Mysqld-nt.exe应用程序错误:“0x005346c4”指令引用的“0x00786000”内存,该内存不能为读...”,然后就MySQL服务也停了,登陆不了,整个数据库都访问不了。
MySQL从MyISAM转换成InnoDB错误与常用解决办法

图1 设置数据库类型

纠结了挺久,也忘了是看到什么文章触发了灵感,反正后来才知道原来是数据引擎不同惹的祸。于是就想到重新运行次设置向导,把数据库类型改成支持InnoDB引擎的。马上行动,在向导里设置数据库类型(也就是图1的database usage)那里,设置成第二项,还在后面的InnoDB Tablespace Settings里把InnoDB数据文件设置放在D:\MySQL InnoDB Datafiles目录里。但是在最后execute执行的时候,却老是在Start Service那里出问题,如下图2。
MySQL从MyISAM转换成InnoDB错误与常用解决办法

图2 Start service出错

想直接到services.msc里面启动服务,也不行。错误提示内容为:“在 本地计算机 无法启动mysql服务 错误1067:进程意外中止。

按照网上的某些做法,卸载了MySQL服务,也没重启就重新设置,问题如故;把服务卸载了,重启后再重新设置,则是启动服务成功,但是在后面的Applying Security Settings的时候有新的问题,如下图3。图2那里的错误提示则变成“ERROR 2003: Can't connect to MySQL server on 'localhost' (10061)", 说明MySQL还是没有启动,或者启动过,出错又关了。
MySQL从MyISAM转换成InnoDB错误与常用解决办法

顺便提一下,在MySQL5里(其他版本的我不知道)每运行一次设置向导,只要按了execute执行,都会在MySQL5的安装目录下自动生成一个原来的MySQL的设置文件my.ini的备份bak文件。并且将以修改的时间命名。因此如果设置出了问题,可以从备份文件恢复。
后来还是在错误日志里找到思路。错误日志就是放在 MySQL5安装目录\Data 目录里的那个以你的计算机名命名的.err文件。
首先我找到以下一段:
InnoDB: Error: log file .\ib_logfile0 is of different size 0 52428800 bytes
InnoDB: than specified in the .cnf file 0 10485760 bytes!
101001 9:47:42 [ERROR] Default storage engine (InnoDB) is not available
101001 9:47:42 [ERROR] Aborting
101001 9:47:42 [Note] D:\MySQL5\bin\mysqld-nt: Shutdown complete
于是就到“MySQL5安装目录\Data ”目录里把ib_logfile0日志文件删掉,重启MySQL服务,还是提示10067错误。再去查看err文件。
101001 18:39:29 InnoDB: Log file .\ib_logfile0 did not exist: new to be created
InnoDB: Setting log file .\ib_logfile0 size to 109 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Progress in MB: 100
InnoDB: Error: log file .\ib_logfile1 is of different size 0 52428800 bytes
InnoDB: than specified in the .cnf file 0 114294784 bytes!
101001 18:39:30 [ERROR] Default storage engine (InnoDB) is not available
101001 18:39:30 [ERROR] Aborting
101001 18:39:30 [Note] D:\MySQL5\bin\mysqld-nt: Shutdown complete
可以看到,ib_logfile0的问题解决了,但是同样的问题却出在ib_logfile1上面了。于是依样画葫芦,把ib_logfile1删了,再重启MySQL服务,却发现没用。难道是还要重启系统。果真,把前面两个ib_logfile删了,重启系统就搞定了。前面的可能是因为刚开机,所以也行。实际上是需要重启系统的。这时的日志如下
101001 19:19:24 InnoDB: Log file .\ib_logfile0 did not exist: new to be created
InnoDB: Setting log file .\ib_logfile0 size to 109 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Progress in MB: 100
101001 19:19:26 InnoDB: Log file .\ib_logfile1 did not exist: new to be created
InnoDB: Setting log file .\ib_logfile1 size to 109 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Progress in MB: 100
InnoDB: Cannot initialize created log files because
InnoDB: data files are corrupt, or new data files were
InnoDB: created when the database was started previous
InnoDB: time but the database was not shut down
InnoDB: normally after that.
101001 19:19:27 [ERROR] Default storage engine (InnoDB) is not available
101001 19:19:27 [ERROR] Aborting
101001 19:19:27 [Note] D:\MySQL5\bin\mysqld-nt: Shutdown complete
好了,现在只剩下最后一个问题了Default storage engine (InnoDB) is not available。去services.msc里面启动MySQL服务,还是出错。但是日志却是显示
InnoDB: No valid checkpoint found.
InnoDB: If this error appears when you are creating an InnoDB database,
InnoDB: the problem may be that during an earlier attempt you managed
InnoDB: to create the InnoDB data files, but log file creation failed.
InnoDB: If that is the case, please refer to
InnoDB: http://dev.mysql.com/doc/mysql/en/Error_creating_InnoDB.html
101001 20:45:09 [ERROR] Default storage engine (InnoDB) is not available
101001 20:45:09 [ERROR] Aborting
101001 20:45:09 [Note] D:\MySQL5\bin\mysqld-nt: Shutdown complete
于是去网上搜索了一下,发现提示No valid checkpoint found.的解决办法:删除所有现有的ibdataN和ib_logfileN文件后,重启Mysql。于是照做,果然行了。
InnoDB: The first specified data file D:\MySQL InnoDB Datafiles\ibdata1 did not exist:
InnoDB: a new database to be created!
101001 21:04:24 InnoDB: Setting file D:\MySQL InnoDB Datafiles\ibdata1 size to 10 MB
InnoDB: Database physically writes the file full: wait...
101001 21:04:25 InnoDB: Log file .\ib_logfile0 did not exist: new to be created
InnoDB: Setting log file .\ib_logfile0 size to 109 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Progress in MB: 100
101001 21:04:27 InnoDB: Log file .\ib_logfile1 did not exist: new to be created
InnoDB: Setting log file .\ib_logfile1 size to 109 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Progress in MB: 100
InnoDB: Doublewrite buffer not found: creating new
InnoDB: Doublewrite buffer created
InnoDB: Creating foreign key constraint system tables
InnoDB: Foreign key constraint system tables created
101001 21:04:31 InnoDB: Started; log sequence number 0 0
101001 21:04:32 [Note] D:\MySQL5\bin\mysqld-nt: ready for connections.
Version: '5.0.18-nt' socket: '' port: 3306 MySQL Community Edition (GPL)
奋斗了一天,总算成功地把MySQL从MyISAM转换成InnoDB引擎了。也学会了读懂错误日志文件err文件了。不过我就在想了,如果从一开始就按照上面的做,不知道会怎么样呢?

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