Re: Value of Quad vs. Dual Processor machine - Mailing list pgsql-performance

From Jeff
Subject Re: Value of Quad vs. Dual Processor machine
Date
Msg-id 20031112092807.14b18bf4.threshar@torgo.978.org
Whole thread Raw
In response to Re: Value of Quad vs. Dual Processor machine  ("Chris Field" <cfield@affinitysolutions.com>)
Responses Re: Value of Quad vs. Dual Processor machine
List pgsql-performance
On Tue, 11 Nov 2003 21:13:19 -0500
"Chris Field" <cfield@affinitysolutions.com> wrote:

> we are looking at Xeon, We are currently running it on a quad sun v880
> compiled to be 64bit and have been getting dreadful performance.  I
> don't think we really have much to gain from going 64bit.
>
>
By chance, are you running 7.3.4 on that sun?
If so, try this:
export CFLAGS=-02
./configure

and rebuild PG.

Before 7.4 PG was build with _no_ optimization on Solaris.
Recompiling gives __HUGE__ (notice the underscores) performance gains.

And onto the dual vs quad.

PG will only use 1 cpu / connection / query.

So if your machine iwll have 1-2 queries running at a time those other 2
proc's will sit around idling.  However if you are going to have a bunch
going, 4 cpus will be most useful.  One of hte nicest things to do for
PG is more ram and fast IO. It really loves those things.

good luck


--
Jeff Trout <jeff@jefftrout.com>
http://www.jefftrout.com/
http://www.stuarthamm.net/

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