当更改了MySQL参数后，重新启动MySQL数据库，查看日志发现以下错误信息

141029  2:23:37 [ERROR] Plugin ‘InnoDB‘ init function returned error.
141029  2:23:37 [ERROR] Plugin ‘InnoDB‘ registration as a STORAGE ENGINE failed.

解决办法

[root@mdb1-x86v-app01 mysql]# ls
ibdata1  master.info    mysql-bin.000002  mysql-bin.000005     mysql-relay-bin.000027  mysql.sock
ib_logfile0  mysql         mysql-bin.000003  mysql-bin.000006     mysql-relay-bin.000028  relay-log.info
ib_logfile1  mysql-bin.000001  mysql-bin.000004  mysql-bin.log.index  mysql-relay-bin.index   test

将ib_logfile删除

[root@mdb1-x86v-app01 mysql]# rm -rf ib_logfile*

重新启动mysql

[root@mdb1-x86v-app01 mysql]# service mysqld restart
停止 mysqld：                                                [确定]
正在启动 mysqld：                                          [确定]

问题解决

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MySQL启动时报Plugin 'InnoDB' registration as a STORAGE ENGINE failed.错误