I can not restart mysql:
sudo service mysql restart
stop: Unknown instance:
start: Job failed to start
sudo -u mysql mysqld
140208 10:17:11 [Note] Plugin 'FEDERATED' is disabled.
140208 10:17:11 InnoDB: The InnoDB memory heap is disabled
140208 10:17:11 InnoDB: Mutexes and rw_locks use GCC atomic builtins
140208 10:17:11 InnoDB: Compressed tables use zlib 184.108.40.206
140208 10:17:11 InnoDB: Initializing buffer pool, size = 4.0G
InnoDB: mmap(4395630592 bytes) failed; errno 12
140208 10:17:11 InnoDB: Completed initialization of buffer pool
140208 10:17:11 InnoDB: Fatal error: cannot allocate memory for the buffer pool
140208 10:17:11 [ERROR] Plugin 'InnoDB' init function returned error.
140208 10:17:11 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
140208 10:17:11 [ERROR] Unknown/unsupported storage engine: InnoDB
140208 10:17:11 [ERROR] Aborting
140208 10:17:11 [Note] mysqld: Shutdown complete
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