Date: Thu, 01 Mar 2007 06:12:46 +0100 From: Sten Daniel Soersdal <netslists@gmail.com> To: "Jim C. Nasby" <decibel@decibel.org> Cc: smp@FreeBSD.org, hackers@FreeBSD.org, current@FreeBSD.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: Progress on scaling of FreeBSD on 8 CPU systems Message-ID: <45E660CE.6010600@gmail.com> In-Reply-To: <20070227221252.GD51916@decibel.org> References: <20070224213111.GB41434@xor.obsecurity.org> <20070227182511.GD29041@decibel.org> <20070227205951.GA56651@xor.obsecurity.org> <20070227221252.GD51916@decibel.org>
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Jim C. Nasby wrote: > On Tue, Feb 27, 2007 at 03:59:52PM -0500, Kris Kennaway wrote: >> On Tue, Feb 27, 2007 at 12:25:11PM -0600, Jim C. Nasby wrote: >>> On Sat, Feb 24, 2007 at 04:31:11PM -0500, Kris Kennaway wrote: >>>> Now that the goals of the SMPng project are complete, for the past >>>> year or more several of us have been working hard on profiling FreeBSD >>>> in various multiprocessor workloads, and looking for performance >>>> bottlenecks to be optimized. >>>> >>>> We have recently made significant progress on optimizing for MySQL >>>> running on an 8-core amd64 system. The graph of results may be found >>>> here: >>> I do *not* want to start a database war here, but I'm wondering if any >>> testing has been done with PostgreSQL? The reason I'm asking is that >>> there are some benchmarks that show MySQL falling off drastically with >>> increased concurrency: >>> >>> http://www.mysqlperformanceblog.com/2006/11/30/interesting-mysql-and-postgresql-benchmarks/ >>> >>> It would be interesting to see how the changes you've made stack up >>> using PostgreSQL as the benchmark. >> I've mentioned this a couple of times, but postgresql didn't scale >> well [on freebsd at least] when I tried it last year. I hope to >> revisit when I get time. > > Let me know if you need help when you get to that point. Keep in mind > that PostgreSQL's out-of-the-box configuration is pretty conservative, > so you won't get good numbers that way. Just a me 2 for postgresql tests: I would be interrested in postgresql numbers too as i have servers with 2 x dual core (xeon, dell 2850ies) currently running 6.1. I'm basically looking for something like a benchmark which would justify upgrading (or even experiment with 7.x) to my boss. I am aware that it's not your job to spend your valuable time doing obscure tests for us, so consider this rant as another "vote" for postgresql performance benchmarks. -- Sten Daniel Soersdal
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