Hello all, Please help me that my server database unexpected shutdown. /var/log/mysql/mysqld-upgrade-run.log show this error 120731 14:45:55 InnoDB: Compressed tables use zlib 1.2.5 120731 14:45:56 InnoDB: Initializing buffer pool, size = 128.0M 120731 14:45:56 InnoDB: Completed initialization of buffer pool 120731 14:45:56 InnoDB: highest supported file format is Barracuda. 120731 14:45:56 InnoDB: Waiting for the background threads to start 120731 14:45:57 InnoDB: 1.1.8 started; log sequence number 1761870 120731 14:45:57 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.5.25-log' socket: '/var/tmp/mysql-protected.Ggzy83/mysql.sock' port: 0 Source distribution 120731 14:45:57 [Note] /usr/sbin/mysqld: Normal shutdown 120731 14:45:57 InnoDB: Starting shutdown... 120731 14:45:58 InnoDB: Shutdown completed; log sequence number 1761880 120731 14:45:58 [Note] /usr/sbin/mysqld: Shutdown complete 120731 14:45:58 mysqld_safe mysqld from pid file /var/tmp/mysql-protected.Ggzy83/mysqld.pid ended 130307 09:33:29 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 130307 9:33:29 InnoDB: The InnoDB memory heap is disabled 130307 9:33:29 InnoDB: Mutexes and rw_locks use GCC atomic builtins 130307 9:33:29 InnoDB: Compressed tables use zlib 1.2.5 130307 9:33:29 InnoDB: Initializing buffer pool, size = 128.0M 130307 9:33:29 InnoDB: Completed initialization of buffer pool 130307 9:33:29 InnoDB: highest supported file format is Barracuda. 130307 9:33:30 InnoDB: Waiting for the background threads to start 130307 9:33:31 InnoDB: 1.1.8 started; log sequence number 118516331 130307 9:33:31 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.5.28-log' socket: '/var/tmp/mysql-protected.LXgQup/mysql.sock' port: 0 Source distribution 130307 9:33:32 [Note] /usr/sbin/mysqld: Normal shutdown 130307 9:33:32 InnoDB: Starting shutdown... 130307 9:33:33 InnoDB: Shutdown completed; log sequence number 118516341 130307 9:33:33 [Note] /usr/sbin/mysqld: Shutdown complete 130307 09:33:33 mysqld_safe mysqld from pid file /var/tmp/mysql-protected.LXgQup/mysqld.pid ended <r/log/mysql/mysqld-upgrade-run.log" 36L, 2220C 36,1 Please help me for solve this problem Thanks