https://technet.microsoft.com/zh-cn/library/ms184361(SQL.90).aspx
如何识别SQL Server中的IO瓶颈
http://blog.csdn.net/dba_huangzj/article/details/7773744
http://www.cnblogs.com/lyhabc/archive/2013/01/13/2858916.html
SET STATISTICS IO
原文：http://www.cnblogs.com/oletan/p/4426331.html
