RE: Why "Separating Data and Indexes improves performance" is a m yth?
- From: <Paula_Stankus@xxxxxxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 23 Apr 2004 15:17:18 -0400
I am dieing laughing: "Codd have mercy on you!!!!!!" oh man!!! Too =
much!
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Mladen Gogala
Sent: Friday, April 23, 2004 3:14 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: Why "Separating Data and Indexes improves performance" is a
m yth?
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=20
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?
--=20
Mladen Gogala
Oracle DBA
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