mysql初始化错误【一】
MySQL 初始化DATA报错
[ERROR] InnoDB: io_setup() failed with EAGAIN after 5 attempts.
[ERROR] InnoDB: Cannot initialize AIO sub-system
[ERROR] InnoDB: Plugin initialization aborted with error Generic error
[ERROR] Plugin 'InnoDB' init function returned error.
[ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
[ERROR] Failed to initialize plugins.
解决方法：
$ cat /proc/sys/fs/aio-max-nr
65536 #64k个
$ vi /etc/sysctl.conf
fs.aio-max-nr=262144#调整为256k个
$ sysctl -p
mysql初始化错误【二】
Can't find error-message file '/usr/local/mysql/errmsg.sys'
环境：RPM包安装的MySQL,自己能找到lib库
原因：一般是初始化的basedir 的路径指定错误了，basedir 一般指定数据库的bin，lib之类的文件
解决方法：初始化的去掉basedir
mysqld --initialize --user=mysql --datadir=/data
