通过开启Apache的Keep-Alive属性来支持php对mysql的持久连接
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php对mysql的持久连接函数为:mysql_pconnect()
/etc/httpd/conf/httpd.conf # 需要在Apache的配置文件设置几个参数
# KeepAlive: Whether or not to allow persistent connections (more than one request per connection). Set to "Off" to deactivate.
Keep-Alive on
# MaxKeepAliveRequests: The maximum number of requests to allow during a persistent connection. Set to 0 to allow an unlimited amount. We recommend you leave this number high, for maximum performance.
MaxKeepAliveRequests 0
# KeepAliveTimeout: Number of seconds to wait for the next request from the same client on the same connection.
KeepAliveTimeout 15 # 客户端发送HTTP请求成功之后,Apache将不会立刻断开socket,而是一直监听客户端这一请求,持续时间为15秒,如果超过这一时间,Apache就立即断开socket。
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