Re: Anyone run across Bug 6503543 Suboptimal plan due to bad cardinality estimate for RANGE join predicates
- From: Riyaj Shamsudeen <riyaj.shamsudeen@xxxxxxxxx>
- To: sacrophyte@xxxxxxxxx
- Date: Tue, 17 Feb 2009 08:36:33 -0600
Charles
Looking at 10053 lines you have posted in your blog, I think that,
predicates are not applied in correct place. I am not sure though.
Can you please send me output of the explain plan output? Specifically, I
am looking for access_predicates and filter_predicates printed at the end of
explain plan. Also, can you please send me 10053 trace files too ?
set lines 120 pages 100
explain plan <your query>;
select * from table(dbms_xplan.display);
--
Cheers
Riyaj Shamsudeen
Principal DBA,
Ora!nternals - http://www.orainternals.com
Specialists in Performance, Recovery and EBS11i
Blog: http://orainternals.wordpress.com
On Tue, Feb 17, 2009 at 8:11 AM, Charles Schultz <sacrophyte@xxxxxxxxx>wrote:
> Good day, list,
>
> I was doing some tuning on a VPD view (a view that calls tables with FGAC
> policies) and the 10053 trace exhibited a gigantic index selectivity that
> surprised me. Curious if anyone else had run across this. I usually check
> out Jonathan Lewis's ScratchPad and look for notes from Richard Foote,
> Alberto Dell'Era, Greg Rahn and many others, but so far I have not seen that
> anyone hit this (of course, I was using google, so....). I am using a
> 10.2.0.3 database, for which the bug is specifically filed, supposedly fixed
> in 11.1.0.7.
>
> For those that like more information:
>
> http://orajourn.blogspot.com/2009/02/tuning-performance-example-using-10046.html
>
> --
> Charles Schultz
> Sent from: Champaign Illinois United States.
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