Date: Thu, 1 Mar 2007 08:19:46 -0700 From: "Coleman Kane" <zombyfork@gmail.com> To: "Sten Daniel Soersdal" <netslists@gmail.com> Cc: Kris Kennaway <kris@obsecurity.org>, smp@freebsd.org, hackers@freebsd.org, current@freebsd.org, "Jim C. Nasby" <decibel@decibel.org> Subject: Re: Progress on scaling of FreeBSD on 8 CPU systems Message-ID: <346a80220703010719k5fcd8d31l94b4dcef3f830a60@mail.gmail.com> In-Reply-To: <45E660CE.6010600@gmail.com> References: <20070224213111.GB41434@xor.obsecurity.org> <20070227182511.GD29041@decibel.org> <20070227205951.GA56651@xor.obsecurity.org> <20070227221252.GD51916@decibel.org> <45E660CE.6010600@gmail.com>
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On 2/28/07, Sten Daniel Soersdal <netslists@gmail.com> wrote: > > 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 I wouldn't recommend upgrading your production servers to FreeBSD 7.x yet, no matter what the results say. -- Coleman
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