RE: SAP Reorgs

From: Powell, Mark D <mark.powell_at_eds.com>
Date: Tue, 15 Jun 2004 09:32:07 -0400
Message-ID: <564DE4477544D411AD2C00508BDF0B6A1CE0AB8C@usahm018.exmi01.exch.eds.com>

The version 8 DB2 UDB manual and the SQL Server 2000 training materials I have been using both recommend object reorganization for performance purposes. The emphasis is on index reorganizations and in a multi-database organization what is a good idea in one db may seem to be a good idea in the others.

There is no substitute for in-depth knowledge of your tool set, but knowledge takes time to accumulate and it can be an uphill battle to convince co-workers to change procedures.

IMHO -- Mark D Powell --

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Michael Fontana Sent: Monday, June 14, 2004 5:28 PM
To: oracle-l_at_freelists.org
Subject: RE: SAP Reorgs

Because of what are mainly RDBMS architectural differences, SAP recommends frequent reorgs, and even offers programs to do so, for their DB2 implementations. When I was a db2/Oracle database consultant for a major oil company, the manager of the group read a document by SAP and IBM recommending frequent reorgs. Because of that fact, to this day, my comrades at this company spend one full weekend a month reorging the Oracle implementations of SAP, even though, in fact, the vendor does not specifically recommend it for Oracle, nor do they measure to determine if they receive any gains from the exercise.

I think this falls amound the category of "urban legend" - that a Reorg of all tablespaces will actually help SAP Oracle performance has never been proved.

Michael Fontana
Sr. DBA
NTT/Verio

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Received on Tue Jun 15 2004 - 08:29:52 CDT