http://netvouz.com/MondoTofu/tag/whats?feed=rss MondoTofu's bookmarks tagged "whats" on Netvouz http://kerryosborne.oracle-guy.com/2009/06/what-did-my-new-index-mess-up/ find significantly different average elapsed times per execution. It uses AWR data and computes a normalized standard deviation between the average elapsed time per execution before and after the date specified by the days_ago parameter Oracle > DB 11g MondoTofu Fri, 06 Jun 2014 15:02:24 GMT