Date: Fri, 17 Jun 2005 16:03:04 +0100 From: Steve Roome <steve@lonres.com> To: David Sze <dsze@distrust.net> Cc: freebsd-stable@freebsd.org, Guy Helmer <ghelmer@palisadesys.com>, Kris Kennaway <kris@obsecurity.org>, Greg 'groggy' Lehey <grog@freebsd.org>, Robert Watson <rwatson@freebsd.org> Subject: Re: FreeBSD MySQL still WAY slower than Linux Message-ID: <20050617150304.GE34777@bibipentium.lonres.com> In-Reply-To: <6.2.1.2.2.20050617091736.05949298@mail.distrust.net> References: <746fd037f6ca8131a8fb8938f1e346e9@lonres.com> <20050610170537.GA67849@bibipentium.lonres.com> <20050611085604.J75625@fledge.watson.org> <20050616161506.GB28794@bibipentium.lonres.com> <6.2.1.2.2.20050617091736.05949298@mail.distrust.net>
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I've posted a longer reply, with a trimmed cc list on the -performance
mailing list if anyone is still interested and I'll leave it off
-stable as it's probably become somewhat off topic now.
Sadly, I don't think simply having an async FS is going to solve our
problem though. :(
Ta,
Steve Roome
For refernce:
On Fri, Jun 17, 2005 at 09:28:54AM -0400, David Sze wrote:
> At 05:15 PM 16/06/2005 +0100, Steve Roome wrote this to All:
> It turns out that the problem was the same thing everyone usually points
> the finger at, but no one actually mentioned this time: Linux mounts its
> partitions async by default. I don't have the exact numbers in front of me
> right now, but these were the ballpark figures (I'm not going to separate
> out results for all of the different threading libraries for FreeBSD
> because the deltas weren't huge):
...
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