RE: dbms_xplan + allstats
- From: Michael Dinh <mdinh@xxxxxxxxx>
- To: "'Chris.Stephens@xxxxxxx'" <Chris.Stephens@xxxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 25 Feb 2011 15:56:38 -0800
Have you taken a look at this as an option?
SQLT (SQLTXPLAIN) - Tool that helps to diagnose SQL statements performing
poorly [ID 215187.1]
Michael Dinh
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From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Stephens, Chris
Sent: Friday, February 25, 2011 12:38 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: dbms_xplan + allstats
11.2.0.2 on RHEL
I'm working on some SQL that suffers from some horrible cardinality estimate
problems due to dummy rows that screw up the columns stats.
Everything was going fine this morning but for some reason I can't get an
execution plan to show me the a-rows now.
I've tried the /*+ gather_plan_stats */ hint.
I've tried "alter session set statistics_level=ALL"
I've tried "alter system set statistics_level=ALL"
I've even tried bouncing the database.
select * from table(dbms_xplan.display_cursor('&sql_id','&child_no','allstats'))
/
....will not show me the a-rows. Anybody have an hints to help me out?
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