本人小白，阿里云挂几个dx3 论坛，centOS7.2，mysql5.5.49，wdcp。近日出现mysql死掉的情况，有时重启mysql可以用几天，有时只半小时又死了。
170208 14:38:56 mysqld_safe Starting mysqld daemon with databases from /www/wdlinux/mysql-5.5.49/data
170208 14:38:56 [Warning] 'THREAD_CONCURRENCY' is deprecated and will be removed in a future release.
170208 14:38:56 [Warning] 'THREAD_CONCURRENCY' is deprecated and will be removed in a future release.
170208 14:38:56 [Note] /www/wdlinux/mysql-5.5.49/bin/mysqld (mysqld 5.5.49) starting as process 1619 ...
170208 14:38:56 [Note] Plugin 'FEDERATED' is disabled.
170208 14:38:57 InnoDB: The InnoDB memory heap is disabled
170208 14:38:57 InnoDB: Mutexes and rw_locks use GCC atomic builtins
170208 14:38:57 InnoDB: Compressed tables use zlib 1.2.7
170208 14:38:57 InnoDB: Initializing buffer pool, size = 128.0M
170208 14:38:57 InnoDB: Completed initialization of buffer pool
170208 14:38:57 InnoDB: highest supported file format is Barracuda.
170208 14:38:57 InnoDB: Waiting for the background threads to start
170208 14:38:58 InnoDB: 5.5.49 started; log sequence number 1595745
170208 14:38:58 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306
170208 14:38:58 [Note] - '0.0.0.0' resolves to '0.0.0.0';
170208 14:38:58 [Note] Server socket created on IP: '0.0.0.0'.
170208 14:38:58 [Note] Event Scheduler: Loaded 0 events
170208 14:38:58 [Note] /www/wdlinux/mysql-5.5.49/bin/mysqld: ready for connections.Version: '5.5.49' socket: '/tmp/mysql.sock' port: 3306 Source distribution
170208 15:02:51 [Note] /www/wdlinux/mysql-5.5.49/bin/mysqld: Normal shutdown
170208 15:02:51 [Note] Event Scheduler: Purging the queue. 0 events
170208 15:02:51 InnoDB: Starting shutdown...
170208 15:02:51 InnoDB: Shutdown completed; log sequence number 1595745
170208 15:02:51 [Note] /www/wdlinux/mysql-5.5.49/bin/mysqld: Shutdown complete
