oracle tuning

https://blog.youkuaiyun.com/u012431409/article/details/52001925

http://www.itpub.net/thread-1750103-2-1.html

https://blog.youkuaiyun.com/hyman_c/article/details/65446184

https://blog.youkuaiyun.com/mqcluck/article/details/82911830

http://www.itpub.net/forum.php?mod=viewthread&tid=1147964&highlight=

https://blog.youkuaiyun.com/lan12334321234/article/details/70049374

https://segmentfault.com/q/1010000018335206