Доброго времени суток.

Подскажите пожалуйста с решением проблемы.
Что имеем, ВПС:KVM SSD Ferrum (1 CPU/1 GB RAM/20 GB SSD); Centos 7(php-fpm + ngix+ mysql)
На сервере крутится всего один сайт на WP

Постоянно падает база данных

Логи mysql180808 03:02:00 mysqld_safe mysqld from pid file /var/run/mariadb/mariadb.pid ended 180808 08:58:56 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 180808 8:58:56 [Note] /usr/libexec/mysqld (mysqld 5.5.56-MariaDB) starting as process 1124… 180808 8:58:56 InnoDB: The InnoDB memory heap is disabled 180808 8:58:56 InnoDB: Mutexes and rw_locks use GCC atomic builtins 180808 8:58:56 InnoDB: Compressed tables use zlib 1.2.7 180808 8:58:56 InnoDB: Using Linux native AIO 180808 8:58:56 InnoDB: Initializing buffer pool, size = 256.0M 180808 8:58:56 InnoDB: Completed initialization of buffer pool 180808 8:58:56 InnoDB: highest supported file format is Barracuda. InnoDB: The log sequence number in ibdata files does not match InnoDB: the log sequence number in the ib_logfiles! InnoDB: Restoring possible half-written data pages from the doublewrite buffer… 180808 8:58:56 InnoDB: Waiting for the background threads to start 180808 8:58:57 Percona XtraDB (http://www.percona.com) 5.5.52-MariaDB-38.3 started; log sequence number 715645817 180808 8:58:57 [Note] Plugin 'FEEDBACK' is disabled. 180808 8:58:57 [Note] Server socket created on IP: '127.0.0.1'. 180808 8:58:57 [Note] Event Scheduler: Loaded 0 events 180808 8:58:57 [Note] /usr/libexec/mysqld: ready for connections. Version: '5.5.56-MariaDB' socket: '/var/lib/mysql/mysql.sock' port: 3306 MariaDB Server 180810 03:00:58 mysqld_safe Number of processes running now: 0 180810 03:00:58 mysqld_safe mysqld restarted 180810 3:00:58 [Note] /usr/libexec/mysqld (mysqld 5.5.56-MariaDB) starting as process 21067… 180810 3:00:58 InnoDB: The InnoDB memory heap is disabled 180810 3:00:58 InnoDB: Mutexes and rw_locks use GCC atomic builtins 180810 3:00:58 InnoDB: Compressed tables use zlib 1.2.7 180810 3:00:58 InnoDB: Using Linux native AIO 180810 3:00:59 InnoDB: Initializing buffer pool, size = 256.0M InnoDB: mmap(275513344 bytes) failed; errno 12 180810 3:00:59 InnoDB: Completed initialization of buffer pool 180810 3:00:59 InnoDB: Fatal error: cannot allocate memory for the buffer pool 180810 3:00:59 [ERROR] Plugin 'InnoDB' init function returned error. 180810 3:00:59 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 180810 3:00:59 [Note] Plugin 'FEEDBACK' is disabled. 180810 3:00:59 [ERROR] Unknown/unsupported storage engine: InnoDB 180810 3:00:59 [ERROR] Aborting 180810 3:00:59 [Note] /usr/libexec/mysqld: Shutdown complete 180810 03:00:59 mysqld_safe mysqld from pid file /var/run/mariadb/mariadb.pid ended 180810 11:38:28 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 180810 11:38:28 [Note] /usr/libexec/mysqld (mysqld 5.5.56-MariaDB) starting as process 1124… 180810 11:38:28 InnoDB: The InnoDB memory heap is disabled 180810 11:38:28 InnoDB: Mutexes and rw_locks use GCC atomic builtins 180810 11:38:28 InnoDB: Compressed tables use zlib 1.2.7 180810 11:38:28 InnoDB: Using Linux native AIO 180810 11:38:28 InnoDB: Initializing buffer pool, size = 256.0M 180810 11:38:28 InnoDB: Completed initialization of buffer pool 180810 11:38:28 InnoDB: highest supported file format is Barracuda. InnoDB: The log sequence number in ibdata files does not match InnoDB: the log sequence number in the ib_logfiles! InnoDB: Restoring possible half-written data pages from the doublewrite buffer… 180810 11:38:28 InnoDB: Waiting for the background threads to start 180810 11:38:29 Percona XtraDB (http://www.percona.com) 5.5.52-MariaDB-38.3 started; log sequence number 721208202 180810 11:38:29 [Note] Plugin 'FEEDBACK' is disabled. 180810 11:38:29 [Note] Server socket created on IP: '127.0.0.1'. 180810 11:38:29 [Note] Event Scheduler: Loaded 0 events 180810 11:38:29 [Note] /usr/libexec/mysqld: ready for connections. Version: '5.5.56-MariaDB' socket: '/var/lib/mysql/mysql.sock' port: 3306 MariaDB Server 180811 20:21:56 mysqld_safe Number of processes running now: 0 180811 20:21:56 mysqld_safe mysqld restarted 180811 20:21:56 [Note] /usr/libexec/mysqld (mysqld 5.5.56-MariaDB) starting as process 12654… 180811 20:21:56 InnoDB: The InnoDB memory heap is disabled 180811 20:21:56 InnoDB: Mutexes and rw_locks use GCC atomic builtins 180811 20:21:56 InnoDB: Compressed tables use zlib 1.2.7 180811 20:21:56 InnoDB: Using Linux native AIO 180811 20:21:56 InnoDB: Initializing buffer pool, size = 256.0M InnoDB: mmap(275513344 bytes) failed; errno 12 180811 20:21:56 InnoDB: Completed initialization of buffer pool 180811 20:21:56 InnoDB: Fatal error: cannot allocate memory for the buffer pool 180811 20:21:56 [ERROR] Plugin 'InnoDB' init function returned error. 180811 20:21:56 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 180811 20:21:56 [Note] Plugin 'FEEDBACK' is disabled. 180811 20:21:56 [ERROR] Unknown/unsupported storage engine: InnoDB 180811 20:21:56 [ERROR] Aborting 180811 20:21:56 [Note] /usr/libexec/mysqld: Shutdown complete 180811 20:21:56 mysqld_safe mysqld from pid file /var/run/mariadb/mariadb.pid ended