開啟部落格發現載入失敗，檢視部落格日誌顯示mysql連線不上
啟動mysql發現錯誤日誌如下：
190612 11:20:47 [note] plugin 'federated' is disabled.
190612 11:20:47 innodb: the innodb memory heap is disabled
190612 11:20:47 innodb: mutexes and rw_locks use gcc atomic builtins
190612 11:20:47 innodb: compressed tables use zlib 1.2.7
190612 11:20:47 innodb: initializing buffer pool, size = 128.0m
innodb: mmap(137363456 bytes) failed; errno 12
190612 11:20:47 innodb: completed initialization of buffer pool
190612 11:20:47 innodb: fatal error: cannot allocate memory for the buffer pool
190612 11:20:47 [error] plugin 'innodb' init function returned error.
190612 11:20:47 [error] plugin 'innodb' registration as a storage engine failed.
190612 11:20:47 [error] unknown/unsupported storage engine: innodb
190612 11:20:47 [error] aborting
190612 11:20:47 [note] /www/wdlinux/mysql-5.5.58/bin/mysqld: shutdown complete
伺服器記憶體只有1g，但是開了很多東西，導致記憶體不足，開啟my.conf修改配置
**mysql的配置都在/ect/my.cnf裡面(ubuntu目錄有稍微的差別，用whereis my.cnf就能找到了)。**
vim /etc/my.cnf
如果有innodb_buffer_pool_size 屬性則修改為50mb，沒有的話新增一行
innodb_buffer_pool_size = 128m
然後重新啟動mysql
service mysqld start
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