RE: Updates with correlated subqueries slow after 9.2->10.2 upgrade

From: Allen, Brandon <>
Date: Tue, 17 Nov 2009 15:44:19 -0700
Message-ID: <64BAF54438380142A0BF94A23224A31E112E9279C5_at_ONEWS06.oneneck.corp>

Greg made an excellent point, and I'll add that your cardinality estimates can still be way off, even with estimate_percent=> 100, if you have skewed data and no histograms (or inaccurate histograms) or various other conditions, so it would still be a good idea to verify your cardinality estimates.


From: [] On Behalf Of Neil Kodner

I'm using
estimate_percent=>100 and method_opt=>'FOR ALL COLUMNS SIZE 1' for these tables

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Received on Tue Nov 17 2009 - 16:44:19 CST

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