mysql启动不起来了！

[root@iZ28r2sl9qkZ data]# service mysqld restart
MySQL server PID file could not be found! [FAILED]
Starting MySQL.The server quit without updating PID file (/[FAILED]server/mysql/data/iZ28r2sl9qkZ.pid).

vim /alidata/log/mysql/error.log

2016-01-29 15:56:01 14303 [Note] InnoDB: Initializing buffer pool, size = 128.0M
InnoDB: mmap(137363456 bytes) failed; errno 12

innodb 配置的内存太大，改一下配置 my.cnf

[mysqld]
innodb_buffer_pool_size = 64M