I have VPS with Ubuntu 14.04, LAMP stack and about 30 small web applications on it. Installed MySQL 5.5.8. It generally works, but sometimes stops by unknown reason.
/var/log/mysql/error.log doesn't have nothing except startup information.
user = mysql pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp lc-messages-dir = /usr/share/mysql skip-external-locking wait_timeout = 28800 interactive_timeout = 28800 key_buffer = 16M max_allowed_packet = 1024M net_read_timeout = 720 net_write_timeout = 720 thread_stack = 192K myisam-recover = BACKUP max_connections = 30 innodb_buffer_pool_size = 1G innodb_force_recovery = 1 query_cache_limit = 16M query_cache_size = 0
total used free shared buffers cached Mem: 6.6G 6.4G 233M 67M 280M 5.0G -/+ buffers/cache: 1.1G 5.5G Swap: 2.9G 22M 2.9G
I checked all logs for OOM messages, but got nothing. I removed AppArmor, it didn't work out. I tried just all. What can be reason?