Доброго времени суток.
Стоит Mysql на ВПС (Ubuntu-16.04-amd64, Оперативная память: 512 Мб, SSD: 15 ГБ).
При работа с сайтом (сайт на WordPress), по нескольку раз в день падает mysql. В логах следующее:
2017-06-13T12:56:02.403900Z 0 [Note] Binlog end
2017-06-13T12:56:02.404366Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
2017-06-13T12:56:30.454066Z 0 [Warning] Changed limits: max_open_files: 1024 (requested 5000)
2017-06-13T12:56:30.454154Z 0 [Warning] Changed limits: table_open_cache: 431 (requested 2000)
2017-06-13T12:56:30.619686Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-06-13T12:56:30.621210Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.18-0ubuntu0.16.04.1) starting as process 31354 ...
2017-06-13T12:56:30.626402Z 0 [Note] InnoDB: PUNCH HOLE support available
2017-06-13T12:56:30.626450Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-06-13T12:56:30.626463Z 0 [Note] InnoDB: Uses event mutexes
2017-06-13T12:56:30.626472Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2017-06-13T12:56:30.626482Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.8
2017-06-13T12:56:30.626491Z 0 [Note] InnoDB: Using Linux native AIO
2017-06-13T12:56:30.626847Z 0 [Note] InnoDB: Number of pools: 1
2017-06-13T12:56:30.627016Z 0 [Note] InnoDB: Not using CPU crc32 instructions
2017-06-13T12:56:30.628725Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2017-06-13T12:56:30.628777Z 0 [ERROR] InnoDB: mmap(137428992 bytes) failed; errno 12
2017-06-13T12:56:30.628788Z 0 [ERROR] InnoDB: Cannot allocate memory for the buffer pool
2017-06-13T12:56:30.628794Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2017-06-13T12:56:30.628803Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2017-06-13T12:56:30.628808Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2017-06-13T12:56:30.628814Z 0 [ERROR] Failed to initialize plugins.
2017-06-13T12:56:30.628818Z 0 [ERROR] Aborting
2017-06-13T12:56:30.628823Z 0 [Note] Binlog end
2017-06-13T12:56:30.629226Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
После этого, Mysql перезагружается и опять работает (но несколько минут он недоступен).
Подскажите, в чем проблема и как это исправить?
Заранее благодарен.
Средний