如何永久解决MySQL错误2002（HY000）

我希望大家都好。我的云服务器有问题，内存为2GB，硬盘为40GB，Wordpress网站每天的点击量约为1000-2000次。我的问题是MySQL总是崩溃，我唯一的选择就是重新启动服务器。我注意到日志没有启用，所以我启用了它们，下面是我发现的：

150207 17:31:42 [Note] Plugin 'FEDERATED' is disabled.
150207 17:31:42 InnoDB: The InnoDB memory heap is disabled
150207 17:31:42 InnoDB: Mutexes and rw_locks use GCC atomic builtins
150207 17:31:42 InnoDB: Compressed tables use zlib 1.2.3.4
150207 17:31:42 InnoDB: Initializing buffer pool, size = 1.2G
InnoDB: mmap(1285636096 bytes) failed; errno 12
150207 17:31:42 InnoDB: Completed initialization of buffer pool
150207 17:31:42 InnoDB: Fatal error: cannot allocate memory for the buffer pool
150207 17:31:42 [ERROR] Plugin 'InnoDB' init function returned error.
150207 17:31:42 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
150207 17:31:42 [ERROR] Unknown/unsupported storage engine: InnoDB
150207 17:31:42 [ERROR] Aborting
150207 17:31:42 [Note] /usr/sbin/mysqld: Shutdown complete

我猜这与内存分配或my.cnf文件中的某些设置有关。内容如下:

[client]
port                           = 3306
socket                         = /var/run/mysqld/mysqld.sock

[mysqld_safe]
socket                         = /var/run/mysqld/mysqld.sock
log_error                      = /var/log/mysql/mysql_error.log

[mysqld]
user                           = mysql
pid-file                       = /var/run/mysqld/mysql.pid
socket                         = /var/run/mysqld/mysqld.sock
port                           = 3306
datadir                        = /var/lib/mysql
thread_cache_size              = 4
table_open_cache               = 800
table_cache                    = 800
key_buffer                     = 32M
query_cache_type               = 1
query_cache_size               = 64M
query_cache_limit              = 8M
innodb_buffer_pool_size        = 1G
innodb_io_capacity             = 2000
innodb_read_io_threads         = 64
innodb_thread_concurrency      = 0
innodb_write_io_threads        = 64
log_error                      = /var/log/mysql/mysql_error.log
slow_query_log                 = 1
slow_query_log_file            = /var/lib/mysql/ib_slow_log.log

任何帮助都将不胜感激

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问候

我知道这很古老，但我想和大家分享一些简单的东西。我所需要做的就是将我的服务器RAM升级到4GB，并将我的密钥缓冲区翻倍，相应地查询缓存大小。从那时起，我的MySQL数据库就没有崩溃。谢谢大家!

你最好向HoboSapiens问好，让我来吧。非常感谢！