Date: Wed, 29 Jun 2005 13:33:56 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: Steve Roome <steve@pepcross.com> Cc: David Sze <dsze@distrust.net>, performance@FreeBSD.org Subject: Re: FreeBSD MySQL still WAY slower than Linux Message-ID: <20050629133209.Q74117@fledge.watson.org> In-Reply-To: <20050623144611.GA64879@bibipentium.lonres.com> References: <6.2.1.2.2.20050620105116.06376688@wheresmymailserver.com> <20050623144611.GA64879@bibipentium.lonres.com>
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On Thu, 23 Jun 2005, Steve Roome wrote: >> The different threading libraries are more for completeness. In my >> last test I saw <10% difference between them on amd64. > > Well, I finally got some tests out for FreeBSD/i386 with -current, Here > we go with a bunch of results of FreeBSD 6 with mysql and different > threading libraries, as for you, there's sadly not enough in it so far. > Maybe I need to tune a whole bunch of stuff I've missed ? What version of MySQL are you using? I saw much better FreeBSD MySQL performance with 4.0.x than 4.1.x in terms of transactions per second, and am wondering what changed in MySQL -- did it start using different IPC primitives, threading primitives, etc? I realize it complicates testing, but if you have a chance to compare 4.0.x and 4.1.x across linux and freebsd, that would be quite helpful, so we can see if there's a change in relative performance. Most of my work to optimize MySQL performance with SMP has been using 4.0.x, FYI, so 4.1.x might require different optimization strategies. Robert N M Watson
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