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From: Michael Stone <mstone+postgres@mathom.us>
To: pgsql-performance@postgresql.org
Subject: Re: New to PostgreSQL, performance considerations
Date: Fri, 15 Dec 2006 19:06:56 -0500
Message-ID: <20061216000655.GI29167@mathom.us> (raw)
In-Reply-To: <E1GvGo0-0004Hv-Em@elasmtp-mealy.atl.sa.earthlink.net>
References: <BCA64E3D-E764-432B-82CB-C2FC75CF3104@purefiction.net>
	<E1Gv0ko-0004Ht-Jx@elasmtp-scoter.atl.sa.earthlink.net>
	<CA660CCB-712C-442F-A48D-4152EF0EFF01@purefiction.net>
	<E1Gv3Rc-0007M7-5X@elasmtp-galgo.atl.sa.earthlink.net>
	<09D6591B-4AA9-4994-BED6-0C7C583BF933@purefiction.net>
	<E1GvBfR-0005f3-11@elasmtp-scoter.atl.sa.earthlink.net>
	<b42b73150612150623s761783c8l9093b2637a1f0c6c@mail.gmail.com>
	<E1GvEcS-0005rM-ME@elasmtp-spurfowl.atl.sa.earthlink.net>
	<b42b73150612150755s9d843f8j972f36599cf9b4dd@mail.gmail.com>
	<E1GvGo0-0004Hv-Em@elasmtp-mealy.atl.sa.earthlink.net>

On Fri, Dec 15, 2006 at 12:24:46PM -0500, Ron wrote:
>ATM, the most we can say is that in a number of systems with modest 
>physical IO subsystems 


So I reran it on a 3.2GHz xeon with 6G RAM off a ramdisk; I/O ain't the 
bottleneck on that one. Results didn't show didn't show any signficant 
gains regardless of compilation options (results hovered around 12k 
tps). If people want to continue this, I will point out that they should 
make sure they're linked against the optimized libpq rather than an 
existing one elsewhere in the library path. Beyond that, I'm done with 
this thread. Maybe there are some gains to be found somewhere, but the 
testing done thus far (while limited) is sufficient, IMO, to demonstrate 
that compiler options aren't going to provide a blow-your-socks-off 
dramatic performance improvement.

Mike Stone



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