RE: Cost vs Rule

From: Magaliff, Bill <Bill.Magaliff_at_lendware.com>
Date: Thu, 07 Mar 2002 12:00:00 -0800
Message-ID: <F001.00422680.20020307120000@fatcity.com>

not much - desire is to keep sql ANSI compliant due to cross-platform issues (want to be able to run the app on multiple db's)

-----Original Message-----
Sent: Thu, March 07, 2002 2:44 PM
To: Multiple recipients of list ORACLE-L

How much have you played with Oracle Hints???

-Joe

• "Magaliff, Bill" <Bill.Magaliff_at_lendware.com> wrote:
  > I work in a dev shop - most of the sql is canned and pretty basic.
  > We've
  > been running CBO in all of our dev environments, but we have a few
  > long txns
  > that just take forever. At the request of some savvy developers, I
  > turned
  > on RBO, and it brought down execution times dramatically.
  >
  > I've been analyzing affected tables often (we do a lot of bulk
  > load/unload
  > for testing), and have played with partitioning and clustering,
  > particularly
  > on one table that's just a dog. CBO will always do a FTS where RBO
  > uses the
  > PK to retrieve data.
  >
  > Where to go next? I've been unable to alter the costs dramatically
  > enough
  > to make any real difference in execution time.
  >
  > thx
  >
  > --
  > Please see the official ORACLE-L FAQ: http://www.orafaq.com
  > --
  > Author: Magaliff, Bill
  > INET: Bill.Magaliff_at_lendware.com
  >
  > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
  > San Diego, California -- Public Internet access / Mailing
  > Lists
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Author: Joe Raube
  INET: jraube_at_yahoo.com

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-- 
Author: Magaliff, Bill
  INET: Bill.Magaliff_at_lendware.com

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Received on Thu Mar 07 2002 - 14:00:00 CST