Bonjour,

Sur un serveur Web fonctionnant sous MariaDB 5.5.40 et Ubuntu 12.04 LTS je rencontre de temps en temps un crash.
Dans mon syslog j'ai :
kernel: [606312.044861] Out of memory: Kill process 1860 (mysqld) score 24 or sacrifice child
kernel: [606312.048008] Killed process 1860 (mysqld) total-vm:922576kB, anon-rss:10680kB, file-rss:0kB
mysqld_safe: Number of processes running now: 0
mysqld_safe: mysqld restarted
mysqld: 141217 11:10:48 InnoDB: The InnoDB memory heap is disabled
mysqld: 141217 11:10:48 InnoDB: Mutexes and rw_locks use GCC atomic builtins
mysqld: 141217 11:10:48 InnoDB: Compressed tables use zlib 1.2.3.4
mysqld: 141217 11:10:48 InnoDB: Using Linux native AIO
mysqld: 141217 11:10:48 InnoDB: Initializing buffer pool, size = 256.0M
mysqld: InnoDB: mmap(275513344 bytes) failed; errno 12
mysqld: 141217 11:10:48 InnoDB: Completed initialization of buffer pool
mysqld: 141217 11:10:48 InnoDB: Fatal error: cannot allocate memory for the buffer pool
mysqld: 141217 11:10:48 [ERROR] Plugin 'InnoDB' init function returned error.
mysqld: 141217 11:10:48 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
mysqld: 141217 11:10:48 [ERROR] mysqld: Out of memory (Needed 128917504 bytes)
mysqld: 141217 11:10:48 [Note] Plugin 'FEEDBACK' is disabled.
mysqld: 141217 11:10:48 [ERROR] Unknown/unsupported storage engine: InnoDB
mysqld: 141217 11:10:48 [ERROR] Aborting
mysqld:
mysqld: 141217 11:10:48 [Note] /usr/sbin/mysqld: Shutdown complete
mysqld:
mysqld_safe: mysqld from pid file /var/run/mysqld/mysqld.pid ended
ET une partie de mon fichier my.cnf :

#innodb_log_file_size = 50M
innodb_buffer_pool_size = 256M
innodb_log_buffer_size = 8M
innodb_file_per_table = 1
innodb_open_files = 400
innodb_io_capacity = 400
innodb_flush_method = O_DIRECT
En fait, il n'arrive pas à donner de la mémoire vive au innodb_buffer_pool_size ? C'est ça ? C'est étrange car j'ai largement de mémoire :
Mem: 4049228k total, 1074800k used, 2974428k free, 86496k buffers
Swap: 1949692k total, 22344k used, 1927348k free, 718208k cached
Pouvez-vous m'éclairer svp ?