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Amazon EC2,mysql中止启动因为InnoDB:mmap(x bytes)失败; errno 12

我根据我在这里阅读的内容在EC2上设置了一个实例服务器

mysql服务器频繁失败,第三次mysql服务器消失了.日志只显示

120423 09:13:38 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
120423 09:14:27 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
120423  9:14:27 [Note] Plugin 'FEDERATED' is disabled.
120423  9:14:27 InnoDB: The InnoDB memory heap is disabled
120423  9:14:27 InnoDB: Mutexes and rw_locks use GCC atomic builtins
120423  9:14:27 InnoDB: Compressed tables use zlib 1.2.3
120423  9:14:27 InnoDB: Using Linux native AIO
120423  9:14:27 InnoDB: Initializing buffer pool, size = 512.0M
InnoDB: mmap(549453824 bytes) failed; errno …
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mysql amazon-ec2

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