optimize table出错解决方法

一个某某库大概360W,为了提高查询效率，做点优化，使用optimize table table.name;出现Table does not support optimize, doing recreate + analyze instead
果断谷歌，查到一段E文。。。

Everytime you do optimize MySQL, by using mysqlcheck -A -o or using ./mysql_optimize from here.
You may see the output

Table does not support optimize, doing recreate + analyze instead.

It is because the table that you are using is InnoDB.

You can optimize the InnoDB tables by using this.

This will create a copy of the original table, and drop the original table, and replace to the original place.

Although this is safe, but I suggest you do backup and test first before doing this.

原来如此，大致意思是说innodb的数据库不支持optimize，可以用
ALTER TABLE table.name ENGINE='InnoDB';
该方法会对旧表以复制的方式新建一个新表，然后删除旧表。虽然这个过程是安全的，但是在进行操作时还是先进行备份为好

还有一种方式：

You can make OPTIMIZE TABLE work on other storage engines by starting mysqld with the --skip-new or --safe-mode option. In this case, OPTIMIZE TABLE is just mapped toALTER TABLE.

上面是说要求我们在启动的时候指定--skip-new或者--safe-mode选项来支持optimize功能

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