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Mysql启动中 InnoDB: Error: log file ./ib_logfile0 is of diff

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Release: 2016-06-07 18:03:38
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对于使用了默认 my.cnf(一般教程都会教你使用support-files/my-medium.cnf)的Mysql服务来说如果中间使用了innodb的话,innodb默认的log file大小是56M

如果你的配置文件使用了类似my-innodb-heavy-4G.cnf作为配置文件的话。
Mysql可以正常启动,但innodb的表无法使用
在错误日志里你会看到如下输出:

InnoDB: Error: log file ./ib_logfile0 is of different size 0 5242880 bytes

现在需要做的事情就是把原来的 innodb 的ib_logfile×备份到一个目录下,然后删除掉原来的文件,重启 mysql。
你会看到ib_logfile*大小变成了你配置文件中指定的大小。
my-innodb-heavy-4G.cnf的话(log file 的大小是256M:innodb_log_file_size = 256M)
你会看到很多个268435456大小的文件。
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