这时候来自
percona 的 tcprstat 来救助了! 这个工具原本
开发用来调查
mysqld 的性能问题,所以不要奇怪它的
默认端口是
3306, 但是我们可以用这个工具来调查典型
的
request->response 类型的服务器。
什么是
tcprstat:
tcprstat is a free, open-source TCP analysis tool that
watches network traffic and computes the delay between
requests and responses. From this it derives response-time
statistics and prints them out. The output is similar to other
Unix -stat tools such as vmstat, iostat, and mpstat. The tool
can optionally watch traffic to only a specified port, which
makes it practical for timing requests and responses to a
single daemon process such as mysqld, httpd, memcached,
or any of a variety of other server processes.