I have the same configuration with the following link - Wordpress running on AWS EC2 micro instance with Linux AMI, so implement the answers recommended by adding swapfile. It seems not working properly still. It keeps crashing every 3 - 5 days, so I have to restart it by "sudo service mysqld restart".
Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12
my configuration /etc/my.cnf looks like this:
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mysqld according to the
# instructions in http://fedoraproject.org/wiki/Systemd
innodb_buffer_pool_size = 128M
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
And free -m looks like this.
total used free shared buffers cached
Mem: 996 134 861 0 2 16
-/+ buffers/cache: 116 880
Swap: 1023 40 983
I attach /var/log/mysqld.log of past few days. Appreciated to receive recommendations.
160103 04:26:52 mysqld_safe Number of processes running now: 0
160103 04:26:52 mysqld_safe mysqld restarted
160103 4:26:54 [Note] Plugin 'FEDERATED' is disabled.
160103 4:26:54 InnoDB: The InnoDB memory heap is disabled
160103 4:26:54 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160103 4:26:54 InnoDB: Compressed tables use zlib 1.2.7
160103 4:26:54 InnoDB: Using Linux native AIO
160103 4:26:54 InnoDB: Initializing buffer pool, size = 128.0M
InnoDB: mmap(137363456 bytes) failed; errno 12
160103 4:26:54 InnoDB: Completed initialization of buffer pool
160103 4:26:54 InnoDB: Fatal error: cannot allocate memory for the buffer pool
160103 4:26:54 [ERROR] Plugin 'InnoDB' init function returned error.
160103 4:26:54 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
160103 4:26:54 [ERROR] Unknown/unsupported storage engine: InnoDB
160103 4:26:54 [ERROR] Aborting
160103 4:26:54 [Note] /usr/libexec/mysqld: Shutdown complete
160103 04:26:54 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
160103 04:38:51 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
160103 4:38:51 [Note] Plugin 'FEDERATED' is disabled.
160103 4:38:51 InnoDB: The InnoDB memory heap is disabled
160103 4:38:51 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160103 4:38:51 InnoDB: Compressed tables use zlib 1.2.7
160103 4:38:51 InnoDB: Using Linux native AIO
160103 4:38:51 InnoDB: Initializing buffer pool, size = 128.0M
160103 4:38:51 InnoDB: Completed initialization of buffer pool
160103 4:38:51 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!
160103 4:38:51 InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
160103 4:38:52 InnoDB: Waiting for the background threads to start
160103 4:38:53 InnoDB: 5.5.42 started; log sequence number 189468094
160103 4:38:53 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306
160103 4:38:53 [Note] - '0.0.0.0' resolves to '0.0.0.0';
160103 4:38:53 [Note] Server socket created on IP: '0.0.0.0'.
160103 4:38:53 [Note] Event Scheduler: Loaded 0 events
160103 4:38:53 [Note] /usr/libexec/mysqld: ready for connections.
Version: '5.5.42' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Community Server (GPL)
160103 04:40:41 mysqld_safe Number of processes running now: 0
160103 04:40:41 mysqld_safe mysqld restarted
160103 4:40:43 [Note] Plugin 'FEDERATED' is disabled.
160103 4:40:44 InnoDB: The InnoDB memory heap is disabled
160103 4:40:44 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160103 4:40:44 InnoDB: Compressed tables use zlib 1.2.7
160103 4:40:44 InnoDB: Using Linux native AIO
160103 4:40:44 InnoDB: Initializing buffer pool, size = 128.0M
InnoDB: mmap(137363456 bytes) failed; errno 12
160103 4:40:44 InnoDB: Completed initialization of buffer pool
160103 4:40:44 InnoDB: Fatal error: cannot allocate memory for the buffer pool
160103 4:40:44 [ERROR] Plugin 'InnoDB' init function returned error.
160103 4:40:44 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
160103 4:40:44 [ERROR] Unknown/unsupported storage engine: InnoDB
160103 4:40:44 [ERROR] Aborting
160103 4:40:45 [Note] /usr/libexec/mysqld: Shutdown complete
160103 04:40:46 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
160103 04:42:22 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
160103 4:42:22 [Note] Plugin 'FEDERATED' is disabled.
160103 4:42:22 InnoDB: The InnoDB memory heap is disabled
160103 4:42:22 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160103 4:42:22 InnoDB: Compressed tables use zlib 1.2.7
160103 4:42:22 InnoDB: Using Linux native AIO
160103 4:42:22 InnoDB: Initializing buffer pool, size = 128.0M
160103 4:42:22 InnoDB: Completed initialization of buffer pool
160103 4:42:22 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!
160103 4:42:22 InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
160103 4:42:22 InnoDB: Waiting for the background threads to start
160103 4:42:23 InnoDB: 5.5.42 started; log sequence number 189494130
160103 4:42:23 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306
160103 4:42:23 [Note] - '0.0.0.0' resolves to '0.0.0.0';
160103 4:42:23 [Note] Server socket created on IP: '0.0.0.0'.
160103 4:42:23 [Note] Event Scheduler: Loaded 0 events
160103 4:42:23 [Note] /usr/libexec/mysqld: ready for connections.
Version: '5.5.42' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Community Server (GPL)
160105 3:28:14 [Note] /usr/libexec/mysqld: Normal shutdown
160105 3:28:14 [Note] Event Scheduler: Purging the queue. 0 events
160105 3:28:14 InnoDB: Starting shutdown...
160105 3:28:17 InnoDB: Shutdown completed; log sequence number 204674622
160105 3:28:17 [Note] /usr/libexec/mysqld: Shutdown complete
160105 03:28:17 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
160105 03:28:19 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
160105 3:28:19 [Note] Plugin 'FEDERATED' is disabled.
160105 3:28:19 InnoDB: The InnoDB memory heap is disabled
160105 3:28:19 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160105 3:28:19 InnoDB: Compressed tables use zlib 1.2.7
160105 3:28:19 InnoDB: Using Linux native AIO
160105 3:28:19 InnoDB: Initializing buffer pool, size = 128.0M
160105 3:28:19 InnoDB: Completed initialization of buffer pool
160105 3:28:19 InnoDB: highest supported file format is Barracuda.
160105 3:28:19 InnoDB: Waiting for the background threads to start
160105 3:28:20 InnoDB: 5.5.42 started; log sequence number 204674622
160105 3:28:20 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306
160105 3:28:20 [Note] - '0.0.0.0' resolves to '0.0.0.0';
160105 3:28:20 [Note] Server socket created on IP: '0.0.0.0'.
160105 3:28:20 [Note] Event Scheduler: Loaded 0 events
160105 3:28:20 [Note] /usr/libexec/mysqld: ready for connections.
Version: '5.5.42' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Community Server (GPL)
160109 09:28:55 mysqld_safe Number of processes running now: 0
160109 09:28:55 mysqld_safe mysqld restarted
160109 9:29:02 [Note] Plugin 'FEDERATED' is disabled.
160109 9:29:03 InnoDB: The InnoDB memory heap is disabled
160109 9:29:03 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160109 9:29:03 InnoDB: Compressed tables use zlib 1.2.7
160109 9:29:03 InnoDB: Using Linux native AIO
160109 9:29:03 InnoDB: Initializing buffer pool, size = 128.0M
InnoDB: mmap(137363456 bytes) failed; errno 12
160109 9:29:03 InnoDB: Completed initialization of buffer pool
160109 9:29:03 InnoDB: Fatal error: cannot allocate memory for the buffer pool
160109 9:29:03 [ERROR] Plugin 'InnoDB' init function returned error.
160109 9:29:03 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
160109 9:29:03 [ERROR] Unknown/unsupported storage engine: InnoDB
160109 9:29:03 [ERROR] Aborting
160109 9:29:03 [Note] /usr/libexec/mysqld: Shutdown complete
160109 09:29:04 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
160109 12:11:23 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
160109 12:11:23 [Note] Plugin 'FEDERATED' is disabled.
160109 12:11:23 InnoDB: The InnoDB memory heap is disabled
160109 12:11:23 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160109 12:11:23 InnoDB: Compressed tables use zlib 1.2.7
160109 12:11:23 InnoDB: Using Linux native AIO
160109 12:11:23 InnoDB: Initializing buffer pool, size = 128.0M
160109 12:11:23 InnoDB: Completed initialization of buffer pool
160109 12:11:23 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!
160109 12:11:23 InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
160109 12:11:23 InnoDB: Waiting for the background threads to start
160109 12:11:24 InnoDB: 5.5.42 started; log sequence number 209589920
160109 12:11:24 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306
160109 12:11:24 [Note] - '0.0.0.0' resolves to '0.0.0.0';
160109 12:11:24 [Note] Server socket created on IP: '0.0.0.0'.
160109 12:11:24 [Note] Event Scheduler: Loaded 0 events
160109 12:11:24 [Note] /usr/libexec/mysqld: ready for connections.
Version: '5.5.42' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Community Server (GPL)
160109 13:22:23 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
160109 13:22:24 [Note] Plugin 'FEDERATED' is disabled.
160109 13:22:24 InnoDB: The InnoDB memory heap is disabled
160109 13:22:24 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160109 13:22:24 InnoDB: Compressed tables use zlib 1.2.7
160109 13:22:24 InnoDB: Using Linux native AIO
160109 13:22:24 InnoDB: Initializing buffer pool, size = 128.0M
160109 13:22:24 InnoDB: Completed initialization of buffer pool
160109 13:22:24 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!
160109 13:22:24 InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
160109 13:22:24 InnoDB: Waiting for the background threads to start
160109 13:22:25 InnoDB: 5.5.42 started; log sequence number 209621895
160109 13:22:25 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306
160109 13:22:25 [Note] - '0.0.0.0' resolves to '0.0.0.0';
160109 13:22:25 [Note] Server socket created on IP: '0.0.0.0'.
160109 13:22:25 [Note] Event Scheduler: Loaded 0 events
160109 13:22:25 [Note] /usr/libexec/mysqld: ready for connections.
Version: '5.5.42' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Community Server (GPL)
160109 13:22:31 [Note] /usr/libexec/mysqld: Normal shutdown
160109 13:22:31 [Note] Event Scheduler: Purging the queue. 0 events
160109 13:22:33 InnoDB: Starting shutdown...
160109 13:22:35 InnoDB: Shutdown completed; log sequence number 209634722
160109 13:22:35 [Note] /usr/libexec/mysqld: Shutdown complete
160109 13:22:36 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
160109 13:22:37 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
160109 13:22:37 [Note] Plugin 'FEDERATED' is disabled.
160109 13:22:37 InnoDB: The InnoDB memory heap is disabled
160109 13:22:37 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160109 13:22:37 InnoDB: Compressed tables use zlib 1.2.7
160109 13:22:37 InnoDB: Using Linux native AIO
160109 13:22:37 InnoDB: Initializing buffer pool, size = 128.0M
160109 13:22:37 InnoDB: Completed initialization of buffer pool
160109 13:22:37 InnoDB: highest supported file format is Barracuda.
160109 13:22:37 InnoDB: Waiting for the background threads to start
160109 13:22:38 InnoDB: 5.5.42 started; log sequence number 209634722
160109 13:22:38 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306
160109 13:22:38 [Note] - '0.0.0.0' resolves to '0.0.0.0';
160109 13:22:38 [Note] Server socket created on IP: '0.0.0.0'.
160109 13:22:38 [Note] Event Scheduler: Loaded 0 events
160109 13:22:38 [Note] /usr/libexec/mysqld: ready for connections.
Version: '5.5.42' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Community Server (GPL)
160109 13:32:02 mysqld_safe Number of processes running now: 0
160109 13:32:02 mysqld_safe mysqld restarted
160109 13:32:05 [Note] Plugin 'FEDERATED' is disabled.
160109 13:32:06 InnoDB: The InnoDB memory heap is disabled
160109 13:32:06 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160109 13:32:06 InnoDB: Compressed tables use zlib 1.2.7
160109 13:32:06 InnoDB: Using Linux native AIO
160109 13:32:06 InnoDB: Initializing buffer pool, size = 128.0M
InnoDB: mmap(137363456 bytes) failed; errno 12
160109 13:32:06 InnoDB: Completed initialization of buffer pool
160109 13:32:06 InnoDB: Fatal error: cannot allocate memory for the buffer pool
160109 13:32:06 [ERROR] Plugin 'InnoDB' init function returned error.
160109 13:32:06 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
160109 13:32:06 [ERROR] Unknown/unsupported storage engine: InnoDB
160109 13:32:06 [ERROR] Aborting
160109 13:32:07 [Note] /usr/libexec/mysqld: Shutdown complete
160109 13:32:08 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
160109 13:40:18 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
160109 13:40:18 [Note] Plugin 'FEDERATED' is disabled.
160109 13:40:18 InnoDB: The InnoDB memory heap is disabled
160109 13:40:18 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160109 13:40:18 InnoDB: Compressed tables use zlib 1.2.7
160109 13:40:18 InnoDB: Using Linux native AIO
160109 13:40:18 InnoDB: Initializing buffer pool, size = 128.0M
160109 13:40:18 InnoDB: Completed initialization of buffer pool
160109 13:40:18 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!
160109 13:40:18 InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
160109 13:40:18 InnoDB: Waiting for the background threads to start
160109 13:40:19 InnoDB: 5.5.42 started; log sequence number 209690481
160109 13:40:19 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306
160109 13:40:19 [Note] - '0.0.0.0' resolves to '0.0.0.0';
160109 13:40:19 [Note] Server socket created on IP: '0.0.0.0'.
160109 13:40:19 [Note] Event Scheduler: Loaded 0 events
160109 13:40:19 [Note] /usr/libexec/mysqld: ready for connections.
Version: '5.5.42' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Community Server (GPL)
160109 13:43:42 mysqld_safe Number of processes running now: 0
160109 13:43:42 mysqld_safe mysqld restarted
160109 13:43:46 [Note] Plugin 'FEDERATED' is disabled.
160109 13:43:47 InnoDB: The InnoDB memory heap is disabled
160109 13:43:47 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160109 13:43:47 InnoDB: Compressed tables use zlib 1.2.7
160109 13:43:47 InnoDB: Using Linux native AIO
160109 13:43:47 InnoDB: Initializing buffer pool, size = 128.0M
InnoDB: mmap(137363456 bytes) failed; errno 12
160109 13:43:47 InnoDB: Completed initialization of buffer pool
160109 13:43:47 InnoDB: Fatal error: cannot allocate memory for the buffer pool
160109 13:43:47 [ERROR] Plugin 'InnoDB' init function returned error.
160109 13:43:47 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
160109 13:43:47 [ERROR] Unknown/unsupported storage engine: InnoDB
160109 13:43:47 [ERROR] Aborting
160109 13:43:47 [Note] /usr/libexec/mysqld: Shutdown complete
160109 13:43:49 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
