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set optimizer features enable to lower version

726809Apr 27 2011 — edited Apr 27 2011
Hi ,

we have ORACLE enterprise version 11.2 on LINUX. recently we found some SQL statemnets run very slow (even we run analyze statistics). But if we set optimizer_features_enable to lower version 10.2.0.3 it run much faster. Following is data we got:

1. Does there has some way we can do (NOT set optimizer_features_enable to lower version) still get better SQL performance?

2. If unfortunately we need set 'optimizer_feature_enable to lower version like 10.2.0.3) does database will have any problem?
Thanks.

-Balaji
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Locked on May 25 2011
Added on Apr 27 2011
#general-database-discussions
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