56a9
http://www.jianshu.com/p/ec4a343c49f0
http://hudeyong926.iteye.com/blog/1490687
[7] MySQL索引原理及慢查询优化
https://tech.meituan.com/mysql-index.html
[8] [译文]MySQL发生死锁肿么办?
http://www.10tiao.com/html/672/201612/2653929751/1.html
[9] MySQL的timeout那点事
http://www.penglixun.com/tech/database/mysql_timeout.html
[10] mysql死锁(deadlock)分析及解决 (索引 间隙锁 sql顺序)
http://www.youyong.top/article/1158d0e3bcf
[11] MySQL 对于千万级的大表要怎么优化?
https://zhihu.com/question/19719997/answer/81930332
[12] 数据库事务系列-事务模型基础
http://bit.ly/2feVxuF
[13] MySQL慢日志简介及Anemometer工具介绍 | | For DBA
http://bit.ly/2uU0Wt3
[14] UPDATE能走索引还会锁全表吗
http://bit.ly/2xqQKde
[15] 实例分析MySQL下的四种事务隔离级别
https://segmentfault.com/a/1190000010561284
[16] 数据库事务系列-MySQL跨行事务模型
http://bit.ly/2wrH5UR