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

From: Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk>
Date: Fri, 23 Apr 2004 19:52:45 +0100
Message-ID: <005001c42964$2f7c4c00$7102a8c0@Primary>

Alas, even that isn't necessarily true.

What if you have a low update rate, but a high read rate. You've just isolated a disc, or two, for a very low level of redo I/O, and reduced the number of devices which are subject to the heavy I/O load.

Sometimes the penalty on redo is less important than the benefit on reads.

Regards

Jonathan Lewis
http://www.jlcomp.demon.co.uk

The Co-operative Oracle Users' FAQ
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Original Message ----- From: <Paula_Stankus_at_doh.state.fl.us> To: <oracle-l_at_freelists.org> Sent: Friday, April 23, 2004 7:40 PM Subject: RE: Why "Separating Data and Indexes improves performance" is a myth?

So in laying out disks for a new database - perhaps the only thing worth = separate out is the redo based on I/O contention - right? =20

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Received on Fri Apr 23 2004 - 13:50:21 CDT