RE: Reorganizing tables

Dennis,

I don't reorganize tables anymore. I used to with Oracle 7.x. But now, it just doesn't matter.

If I were you, I would spend my time analyzing the sql's the developers are using to solve the FTS by either adding indexes, adding summary tables, MV's or even partitioning.

Good Luck!

Tom Mercadante
Oracle Certified Professional

-----Original Message-----
From: DENNIS WILLIAMS [mailto:DWILLIAMS_at_LIFETOUCH.COM] Sent: Monday, March 24, 2003 12:39 PM
To: Multiple recipients of list ORACLE-L Subject: Reorganizing tables

We have a new manager, and at his last employer the DBAs reorganize Oracle tables on a regular basis. I don't reorg tables on a regular basis. He is lobbying us to investigate this and test whether it would or wouldn't increase performance. We are on Oracle 8.1.6, Compaq Tru64, all tables are LMT with uniform extents. This is an OLTP system, but the users continue to add reports and the reports do quite a few full table scans. The reports are probably the critical performance issue at this time.

• Do you do regular table reorgs? What benefit does that give you?
• Are there any indicators of when a table reorg would be beneficial?
• What sort of test would verify whether a table reorg changed performance?

Dennis Williams
DBA, 40%OCP, 100% DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

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Author: DENNIS WILLIAMS
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