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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Why "Separating Data and Indexes improves performance" is a myth?
Better yet: Do an automated stress-test before release into production =
and understand the characteristics of the database so you can spread out =
the I/O in a way that makes sense before you have to.
-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Nuno Souto
Sent: Friday, April 23, 2004 3:23 PM
To: oracle-l_at_freelists.org
Subject: Re: Why "Separating Data and Indexes improves performance" is a
myth?
Not really. If you have a "mostly-read" database, why separate the redo if you rarely write to it? Waste of time and disk.
I guess the real issue in this whole argument of separate I/O is that there is no such thing as a silver-bullet approach to splitting files in an Oracle database. The nature of EACH SPECIFIC case dictates what should be spread across devices and what should not.
To try and find a one-size fits all rule is just condemned to failure.
The problem is: Find out if you have I/O contention. The solution is: IF you have I/O contention, find out where and spread THAT load.
If that means you have to allocate more disk to the system tablespace, or to the redo, or to a single table, or to a group of indexes, or whatever is your problem area, then so be it.
Trying to make a rule of thumb out of something that has got no hands is really hard... ;)
Cheers
Nuno Souto
in sunny Sydney, Australia
dbvision_at_optusnet.com.au
-- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html ----------------------------------------------------------------- ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request_at_freelists.org put 'unsubscribe' in the subject line. -- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------Received on Fri Apr 23 2004 - 14:51:43 CDT
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