2018-05-07 01:17:43 3327 [Note] Plugin 'FEDERATED' is disabled. 2018-05-07 01:17:43 7f4912cf4740 InnoDB: Warning: Using innodb_additional_mem_pool_size is DEPRECATED. This option may be removed in future releases, together with the option innodb_use_sys_malloc and with the InnoDB's internal memory allocator. 2018-05-07 01:17:43 3327 [Note] InnoDB: Using atomics to ref count buffer pool pages 2018-05-07 01:17:43 3327 [Note] InnoDB: The InnoDB memory heap is disabled 2018-05-07 01:17:43 3327 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins 2018-05-07 01:17:43 3327 [Note] InnoDB: Memory barrier is not used 2018-05-07 01:17:43 3327 [Note] InnoDB: Compressed tables use zlib 1.2.3 2018-05-07 01:17:43 3327 [Note] InnoDB: Using Linux native AIO 2018-05-07 01:17:43 3327 [Note] InnoDB: Using CPU crc32 instructions 2018-05-07 01:17:43 3327 [Note] InnoDB: Initializing buffer pool, size = 80.0G InnoDB: mmap(10989076480 bytes) failed; errno 12 2018-05-07 01:17:43 3327 [ERROR] InnoDB: Cannot allocate memory for the buffer pool 2018-05-07 01:17:43 3327 [ERROR] Plugin 'InnoDB' init function returned error. 2018-05-07 01:17:43 3327 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 2018-05-07 01:17:43 3327 [ERROR] Unknown/unsupported storage engine: InnoDB 2018-05-07 01:17:43 3327 [ERROR] Aborting
服务器开启了一个任务,比较消耗资源,而服务器上的mysql意外宕机了,error日志描述如山所示:
[ERROR] InnoDB: Cannot allocate memory for the buffer pool
使用free -g查看到当前系统可用内存只有6g了
而检查my.cnf配置文件,里面的buffer_pool是
innodb_buffer_pool_size=64G
估计当前可用内存不够了,所以down机了,开启的任务不好停止,把innodb_buffer_pool_size的配置改成1G,重启下mysql服务,问题解决。