Date: Wed, 29 Jun 2005 09:58:39 -0400 From: David Sze <dsze@alumni.uwaterloo.ca> To: Robert Watson <rwatson@freebsd.org> Cc: Steve Roome <steve@pepcross.com>, performance@freebsd.org Subject: Re: FreeBSD MySQL still WAY slower than Linux Message-ID: <6.2.1.2.2.20050629095600.05a54268@mail.distrust.net> In-Reply-To: <20050629133209.Q74117@fledge.watson.org> References: <6.2.1.2.2.20050620105116.06376688@wheresmymailserver.com> <20050623144611.GA64879@bibipentium.lonres.com> <20050629133209.Q74117@fledge.watson.org>
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At 01:33 PM 29/06/2005 +0100, Robert Watson wrote this to All: >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. I haven't got around to finishing all the benchmarks yet, but on 5.4-RELEASE-p2 amd64, I see about 5-7% better performance with 4.0.x versus 4.1.x for the select-key benchmark, and no improvement for update-select (both with InnoDB tables, using the "my-innodb-heavy-4G.cnf" file).
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