centos新安装mysql5.6报错了
2017-09-12 14:15:09 3442 Plugin 'FEDERATED' is disabled.2017-09-12 14:15:09 3442 InnoDB: Using atomics to ref count buffer pool pages
2017-09-12 14:15:09 3442 InnoDB: The InnoDB memory heap is disabled
2017-09-12 14:15:09 3442 InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-09-12 14:15:09 3442 InnoDB: Memory barrier is not used
2017-09-12 14:15:09 3442 InnoDB: Compressed tables use zlib 1.2.3
2017-09-12 14:15:09 3442 InnoDB: Using Linux native AIO
2017-09-12 14:15:09 3442 InnoDB: Not using CPU crc32 instructions
2017-09-12 14:15:09 3442 InnoDB: Initializing buffer pool, size = 128.0M
InnoDB: mmap(136019968 bytes) failed; errno 12
2017-09-12 14:15:09 3442 InnoDB: Cannot allocate memory for the buffer pool
2017-09-12 14:15:09 3442 Plugin 'InnoDB' init function returned error.
2017-09-12 14:15:09 3442 Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2017-09-12 14:15:09 3442 Unknown/unsupported storage engine: InnoDB
2017-09-12 14:15:09 3442 Aborting
解决办法：
查看内存
$ free
total used free shared buffers cached
Mem: 608476 565044 43432 0 1284 53996
-/+ buffers/cache: 509764 98712
Swap: 0 0 0
好吧，明显的swap问题。适当增加swap，采用
$ sudo dd if=/dev/zero of=/swapfile bs=1M count=1024 #增加1G的SWAP进去
$ sudo mkswap /swapfile
$ sudo swapon /swapfile
$ free
total used free shared buffers cached
Mem: 608476 601432 7044 0 824 88752
-/+ buffers/cache: 511856 96620
Swap: 1048572 0 1048572
此处不建议将swapon 写到/etc/fstab这里,直接写到/etc.rc.local中更为稳妥启动解决...
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