数据库错误日志中一大堆这样的代码 为什么

hfh08

070704 16:19:33  InnoDB: Starting shutdown...
070704 16:19:34  InnoDB: Shutdown completed; log sequence number 0 43675
070704 16:19:34 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete

070704 16:19:34  mysqld ended

070704 16:20:30  mysqld started
070704 16:20:31  InnoDB: Started; log sequence number 0 43675
070704 16:20:31 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.0.27-standard'  socket: '/tmp/mysql.sock'  port: 3306  MySQL Community Edition - Standard (GPL)
070708 16:33:56 [Note] /usr/local/mysql/bin/mysqld: Normal shutdown

070708 16:33:56 [ERROR] /usr/local/mysql/bin/mysqld: Sort aborted
070708 16:33:58  InnoDB: Starting shutdown...
070708 16:33:59  InnoDB: Shutdown completed; log sequence number 0 43675
070708 16:33:59 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete

070708 16:34:00  mysqld ended

070708 16:34:53  mysqld started
070708 16:34:53  InnoDB: Started; log sequence number 0 43675
070708 16:34:54 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.0.27-standard'  socket: '/tmp/mysql.sock'  port: 3306  MySQL Community Edition - Standard (GPL)
070709 22:00:26 [Note] /usr/local/mysql/bin/mysqld: Normal shutdown

070709 22:00:28  InnoDB: Starting shutdown...
070709 22:00:30  InnoDB: Shutdown completed; log sequence number 0 43675
070709 22:00:30 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete

070709 22:00:30  mysqld ended

070709 22:01:24  mysqld started
070709 22:01:24  InnoDB: Started; log sequence number 0 43675
070709 22:01:25 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.0.27-standard'  socket: '/tmp/mysql.sock'  port: 3306  MySQL Community Edition - Standard (GPL)
070709 22:19:09 [Note] /usr/local/mysql/bin/mysqld: Normal shutdown

070709 22:19:09 [ERROR] /usr/local/mysql/bin/mysqld: Sort aborted
070709 22:19:11  InnoDB: Starting shutdown...
070709 22:19:13  InnoDB: Shutdown completed; log sequence number 0 43675
070709 22:19:13 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete

070709 22:19:13  mysqld ended

070709 22:20:05  mysqld started
070709 22:20:05  InnoDB: Started; log sequence number 0 43675
070709 22:20:06 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.0.27-standard'  socket: '/tmp/mysql.sock'  port: 3306  MySQL Community Edition - Standard (GPL)
070712  0:04:33 [Note] /usr/local/mysql/bin/mysqld: Normal shutdown

070712  0:04:33  InnoDB: Starting shutdown...
070712  0:04:35  InnoDB: Shutdown completed; log sequence number 0 43675
070712  0:04:35 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete

070712 00:04:35  mysqld ended

070712 00:05:30  mysqld started
070712  0:05:30  InnoDB: Started; log sequence number 0 43675
070712  0:05:31 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.0.27-standard'  socket: '/tmp/mysql.sock'  port: 3306  MySQL Community Edition - Standard (GPL)
070712 23:10:51 [Note] /usr/local/mysql/bin/mysqld: Normal shutdown

070712 23:10:52  InnoDB: Starting shutdown...
070712 23:10:54  InnoDB: Shutdown completed; log sequence number 0 43675
070712 23:10:54 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete

070712 23:10:54  mysqld ended

070712 23:11:48  mysqld started
070712 23:11:48  InnoDB: Started; log sequence number 0 43675
070712 23:11:49 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.0.27-standard'  socket: '/tmp/mysql.sock'  port: 3306  MySQL Community Edition - Standard (GPL)
070713  5:48:57 [Note] /usr/local/mysql/bin/mysqld: Normal shutdown

070713  5:48:57  InnoDB: Starting shutdown...
070713  5:49:00  InnoDB: Shutdown completed; log sequence number 0 43675
070713  5:49:00 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete

070713 05:49:00  mysqld ended

070713 05:49:53  mysqld started
070713  5:49:53  InnoDB: Started; log sequence number 0 43675
070713  5:49:54 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.0.27-standard'  socket: '/tmp/mysql.sock'  port: 3306  MySQL Community Edition - Standard (GPL)
070713 11:22:21  mysqld started
070713 11:22:21  InnoDB: Started; log sequence number 0 43675
070713 11:22:22 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.0.27-standard'  socket: '/tmp/mysql.sock'  port: 3306  MySQL Community Edition - Standard (GPL)
070713 13:32:28 [Note] /usr/local/mysql/bin/mysqld: Normal shutdown

070713 13:32:28  InnoDB: Starting shutdown...
070713 13:32:29  InnoDB: Shutdown completed; log sequence number 0 43675
070713 13:32:29 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete

070713 13:32:29  mysqld ended

yejr

sort_buffer_size之类的内存相关参数设置的不合理导致的