The Oracle 9.2.0.4 Optimizer - are there problems with it?

From: Wales, Stephen (RTSI) <Stephen.Wales_at_riotinto.com>
Date: Fri, 2 Apr 2004 14:09:57 -0700
Message-ID: <9ACD42A615C4F1419122D16AB1C718DE167B48@rtsiexch00.kennecott.riotinto.org>

We recently (2 weeks ago) threw the 9.2.0.4 patch onto our production = 9.2.0.2 databases.

Since that time, users have been complaining about long running queries = are running even longer. Now I'm sure that part of that is poor query = structure (I've analyzed and tuned 2 of them this week already) but the = users want to know why their queries are going so slow...

I've seen some notes on Metalink referencing a parameter = optimizer_features_enable and talk of setting it to 8.1.7 - is this = worth doing? Anyone got any input on this? Or had similar problems? = Or know of a solution?

Would appreciate any advice.

Thanks
Steve

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Received on Fri Apr 02 2004 - 15:06:23 CST