Re: Why "Separating Data and Indexes improves performance" is a myth?
- From: "Jonathan Lewis" <jonathan@xxxxxxxxxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 23 Apr 2004 19:52:45 +0100
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@xxxxxxxxxxxxxxx>
To: <oracle-l@xxxxxxxxxxxxx>
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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