一大早来到公司，看到了一个噩梦，后台总是登录不上，登录就出错，还以为被黑客入侵了。经过1个小时的排错原因如下：
我的服务器是linux的，mysql的报错日志路径是/var/log/,经过查看日志发现错误信息为：
Can't start server: can't create PID file: No space left on device
120321 14:23:54 InnoDB: 1.1.8 started; log sequence number 1595695
120321 14:23:54 [ERROR] /usr/libexec/mysqld: Error writing file ‘/var/run/mysqld/mysqld.pid' (Errcode: 28)
120321 14:23:54 [ERROR] Can't start server: can't create PID file: No space left on device
120321 14:23:54 mysqld_safe Number of processes running now: 0
120321 14:23:54 mysqld_safe mysqld restarted
120321 14:23:54 [Note] Plugin ‘FEDERATED' is disabled.
120321 14:23:54 InnoDB: The InnoDB memory heap is disabled
120321 14:23:54 InnoDB: Mutexes and rw_locks use InnoDB's own implementation
120321 14:23:54 InnoDB: Compressed tables use zlib 1.2.3
120321 14:23:54 InnoDB: Using Linux native AIO
120321 14:23:54 InnoDB: Initializing buffer pool, size = 128.0M
120321 14:23:54 InnoDB: Completed initialization of buffer pool
120321 14:23:54 InnoDB: highest supported file format is Barracuda.
120321 14:23:55 InnoDB: Waiting for the background threads to start
这个错误。
提示磁盘空间不足
后用df -h 命令查看
我的是mysql的日志占用太多
我把mysql的日志删除掉
service mysqld start
重新启动mysql服务就好了
因为马上过年要回家了，虚惊一场，吓死宝宝了。
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