Date: Tue, 28 Jun 2005 19:04:18 +0930 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-stable@freebsd.org Cc: Michael Schuh <michael.schuh@gmail.com>, Roman Neuhauser <neuhauser@sigpipe.cz> Subject: Re: FreeBSD MySQL still WAY slower than Linux Message-ID: <200506281904.48464.doconnor@gsoft.com.au> In-Reply-To: <20050628092126.GB48140@isis.sigpipe.cz> References: <1dbad315050621051525f4c6fc@mail.gmail.com> <200506211451.j5LEpA2W024350@lurza.secnetix.de> <20050628092126.GB48140@isis.sigpipe.cz>
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[-- Attachment #1 --] On Tue, 28 Jun 2005 18:51, Roman Neuhauser wrote: > No you don't. You want to make a side-by-side comparison > of two products, and if one of them underperforms, it just > underperforms. You cannot use a poor location selection > strategy in the driver as an excuse for poor operation. Why not? It's not a side-by-side comparison if the underlying hardware is different.. I don't think ascribing ALL the poor performance to being on the wrong part of the disk is putting your head in the sand, but it DOES make a difference. > In all honesty, I'm getting somewhat irritated by all the > "dd is meaningless performance measurement tool, use something > real" and similar arguments: dd is a real command for real > work, and if it shows abysmal performance of sequential writes, > then there's a problem. dd is a useful start, but you shouldn't read too much into the results since, in general, dd doesn't reflect real world usage patterns. There are some people who seem to want to ignore the results and shoot them down with bland assertions about how poorly the tests have been run. There are also people doing crappy tests, however there IS a middle ground where I think most reasonable people are sitting - they want decent tests, and have a good attitude to fixing the problems. -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQBCwRm45ZPcIHs/zowRAlKUAJsEJoQuUwQoyZCyuYde3JcGJgJluQCdEL8Y Nj77+PjQAZdjV8NaTN11u4I= =jvhk -----END PGP SIGNATURE-----
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