MySQL慢查询的定位与优化

参考链接:http://orangeholic.iteye.com/blog/1700509

英文链接:https://www.dreamhost.com/blog/2013/08/19/mysql-checking-the-slow-query-log-and-simple-indexing/

                 https://www.percona.com/blog/2014/03/14/mysql-slow-query-log-tools-and-tips/

官网链接:https://dev.mysql.com/doc/refman/5.6/en/slow-query-log.html