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RE: Oracle's use of Indexes

From: DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Date: Mon, 02 Jun 2003 06:50:16 -0800
Message-ID: <F001.005A811F.20030602065016@fatcity.com>


Craig - Compare the init.ora file for these instances.

Dennis Williams
DBA, 80%OCP, 100% DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Monday, June 02, 2003 8:45 AM
To: Multiple recipients of list ORACLE-L

OK, I'm confused. Maybe it's Monday morning and my brain's not working. We have a production schema and a test schema on the same Oracle 8.1.7 instance, running on Windows. They both have a customer table, with 3 million and 2 million records respectively. They both have the same indexes, and both have been analyzed today. Production used an index and took 40ms. Test didn't and took 20s. I played around, analyzing, dropping and creating indexes etc. Now neither of them use the index, both taking around 20s.
I can add a hint, which works, but I want to know what changed.  

TIA   Craig Healey



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Author: Craig Healey
  INET: c.healey_at_hhsuk.com

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Author: DENNIS WILLIAMS
  INET: DWILLIAMS_at_LIFETOUCH.COM
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