Greg I did explain plans too and there were changes (i thought i mentioned this..). We just took a 10053 trace to see if we can get any other useful information as originally when the developer ran this from TOAD the sql never completed. We did not even have a sql id at that time. But what striked me was this event. The same query runs fine when I use the ordered hint or set the optimizer_features_enabled to 11.1.0.7 and the event no longer appears I was not mentioning about 10053 trace being useful though but se.sql . Explain plan does show differences obviously. On Tue, Nov 8, 2011 at 7:30 PM, Greg Rahn <greg@xxxxxxxxxxxxxxxxxx> wrote: > I'd disagree that this is useful -- the most useful information with > plan changes is simply the full plans (dbms_xplan) and you dont even > need a 10053 trace for that. > > On Tue, Nov 8, 2011 at 7:05 PM, Kumar Madduri <ksmadduri@xxxxxxxxx> wrote: > > Hi > > As part of regression testing in our db upgrade from 11.1.0.7 to > 11.2.0.2, > > one of the developers reported a slow sql (attached slow_sql.sql) > > We did a 10053 trace and noticed one of the things was wip_entities was > not > > doing a Index scan in 11gR2 vs 11gR1. > > But what is most useful till this point is Tanel's se.sql script which > > reports this > > -- > Regards, > Greg Rahn > http://structureddata.org > -- //www.freelists.org/webpage/oracle-l