Mindaugas Riauba wrote:
NetApp support is claiming that such performance is normal. Somehow
I do not believe that 2007 model should deliver such XXth century
performance levels. :)
How many disks, what RPM are they running at, what I/O block size
is being used and what protocol
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Mindaugas Riauba
Sent: Thursday, November 06, 2008 3:45 AM
To: [EMAIL PROTECTED]; CentOS@centos.org
Subject: [CentOS] Painfully slow NetApp with databas
We have long running problem with NetApp
On Thu, 2008-11-06 at 16:32 -0500, David Ross wrote:
snip
There many factors which impact database i/o performance. You are comparing
two probably dissimilar i/o paths. Configuration differences (disk,
controller, connection, kernel parameters) may be part of the problem.
Physical vs.
The critical components were the most frequent access/update patterns
versus the physical organization of the primary table(s) and their
_primary_ indexes, or hashes. Do DBMs still use those things?
Prmary Indexes have a lot more to do with I/O than most people think. You
really have to
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