nginx优化之request
nginx优化之request_time 和upstream_response_time差别1、request_time官网描述：request processing time in seconds with a milliseconds resolution; time elapsed between the first bytes were read from the client and the log write after the last bytes were sent to the client 。指的就是从接受用户请求的第一个字节到发送完响应数据的时间，即包括接收请求数据时间、程序响应时间、输出响应数据时间。 2、upstream_response_time官网描述：keeps times of responses obtained from upstream servers; times are kept in seconds with a milliseconds resolution. Several response times are separated by commas and colons like addresses in the $upstream_addr variable 是指从Nginx向后端（php-cgi)建立连接开始到接受完数据然后关闭连接为止的时间。 从上面的描述可以看出，$request_time肯定比$upstream_response_time值大，特别是使用POST方式传递参数时，因为Nginx会把request body缓存住，接受完毕后才会把数据一起发给后端。所以如果用户网络较差，或者传递数据较大时，$request_time会比$upstream_response_time大很多。 所以如果使用nginx的accesslog查看php程序中哪些接口比较慢的话，记得在log_format中加入$upstream_response_time。 posted on 2017-06-14 11:12 dongruiha 阅读(...) 评论(...)编辑 收藏
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