MySQL Innodb存储引擎因为缓存配置出现的错误

引用

100920 10:50:21 mysqld_safe Starting mysqld daemon with databases from /byread/data
InnoDB: The InnoDB memory heap is disabled
InnoDB: Mutexes and rw_locks use GCC atomic builtins
InnoDB: mmap(11010048000 bytes) failed; errno 12
InnoDB: Fatal error: cannot allocate the memory for the buffer pool
100920 10:50:21 [ERROR] Plugin 'InnoDB' init function returned error.
100920 10:50:21 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
100920 10:50:21 [Warning] 'user' entry 'root@test3' ignored in --skip-name-resolve mode.
100920 10:50:21 [Warning] 'user' entry '@test3' ignored in --skip-name-resolve mode.
100920 10:50:21 [Note] Event Scheduler: Loaded 0 events
100920 10:50:21 [Note] /byread/bin/mysql/libexec/mysqld: ready for connections.
Version: '5.1.45-log'  socket: '/byread/bin/mysql/tmp/mysql.sock'  port: 3306  MySQL Community Server (GPL)
100920 10:50:50 [Note] /byread/bin/mysql/libexec/mysqld: Normal shutdown

100920 10:50:50 [Note] Event Scheduler: Purging the queue. 0 events
100920 10:50:52 [Note] /byread/bin/mysql/libexec/mysqld: Shutdown complete

100920 10:50:52 mysqld_safe mysqld from pid file /byread/data/cas.pid ended

出现这种情况，因为大意没有察看日志，所以当建表的时候，mysql会使用存储引擎MyISAM来建表，而不进行提示。

一开始出现问题小郁闷了一下，执行以下命令发现没有InnoDB时才发现问题。

引用

mysql> show engines;
+------------+---------+------------------------------------------------------------+--------------+------+------------+
| Engine     | Support | Comment                                                    | Transactions | XA   | Savepoints |
+------------+---------+------------------------------------------------------------+--------------+------+------------+
| MRG_MYISAM | YES     | Collection of identical MyISAM tables                      | NO           | NO   | NO         |
| CSV        | YES     | CSV storage engine                                         | NO           | NO   | NO         |
| MyISAM     | DEFAULT | Default engine as of MySQL 3.23 with great performance     | NO           | NO   | NO         |
| InnoDB     | YES     | Supports transactions, row-level locking, and foreign keys | YES          | YES  | YES        |
| MEMORY     | YES     | Hash based, stored in memory, useful for temporary tables  | NO           | NO   | NO         |
+------------+---------+------------------------------------------------------------+--------------+------+------------+
5 rows in set (0.00 sec)