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Re: Why "Separating Data and Indexes improves performance" is a m yth?

From: Mladen Gogala <>
Date: Fri, 23 Apr 2004 15:14:05 -0400
Message-ID: <>

Rich, if the tables are not OLTP tables, you can probably help with bitmap indexes and (please, don't laugh) clusters, if the rows are not too long. You may even try materialized views, if that would help those queries. On the other hand, if the tables are of OLTP nature, which means that they are frequently accessed by concurrent DML statements, then may Codd have mercy on you!

On 04/23/2004 03:04:27 PM, "Jesse, Rich" wrote:
> The one that comes to mind is a particularly nasty query from a Business
> Objects (aka "B.O.") report that runs against our OLTP DB. Did I mention
> that the vendor ported the schema from VMS RMS files, so there's no
> normalization (e.g. first row of description in master table, with the rest
> of the description optionally in another table) or RI or PKs?

Mladen Gogala
Oracle DBA

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Received on Fri Apr 23 2004 - 14:11:47 CDT

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