RE: In 12.1.0.2 ADS due to SPD will be always at level 11
- From: Christian Antognini <Christian.Antognini@xxxxxxxxxxxx>
- To: "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>, "yasser8@xxxxxxxxx" <yasser8@xxxxxxxxx>
- Date: Wed, 9 Dec 2015 14:49:24 +0000
Hi Yasser
I read at many places that in version 12.1.0.2 Adaptive Dynamic Sampling
done due to Sql Plan Directive will be always at level 11, but
dbms_xplan.display_cursor doesn't refelct this truth.
This is because the information provided by dbms_xplan is wrong. Actually, the
content of v$sql_plan.other_xml is wrong.
The problem is that other_xml provides the level that was set during the parse
and not the level that was actually used by the query optimizer.
HTH
Chris Antognini
Troubleshooting Oracle Performance, Apress 2008/2014
http://top.antognini.ch
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