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Re: [Fwd: XFS lstat() _very_ slow on SMP]

To: Jan Derfinak <ja@xxxxxxxxxxxx>
Subject: Re: [Fwd: XFS lstat() _very_ slow on SMP]
From: Anders Saaby <as@xxxxxxxxxxxx>
Date: Fri, 20 May 2005 16:42:04 +0200
Cc: Jan Kasprzak <kas@xxxxxxxxxx>, Dave Chinner <dgc@xxxxxxx>, Steve Lord <lord@xxxxxxx>, XFS Linux <linux-xfs@xxxxxxxxxxx>
In-reply-to: <Pine.LNX.4.58.0505201523040.15817@alienAngel.home.sk>
Organization: Cohaesio A/S
References: <4288D8B8.4070302@xfs.org> <20050520124643.GA5380@fi.muni.cz> <Pine.LNX.4.58.0505201523040.15817@alienAngel.home.sk>
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On Friday 20 May 2005 15:26, Jan Derfinak wrote:
> On Fri, 20 May 2005, Jan Kasprzak wrote:
> > Dave Chinner wrote:
> > : Have you tried setting the ihashsize mount option?
> >
> >     No. I use the defaults. I can try it, just tell me
> > a reasonable value to try (I suppose that it expects
> > a numeric argument).
>
> According to
> http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?coll=linux&db=relnot
>es&fname=/usr/relnotes/sgi-propack-3-for-linux-sp5
>
> 65536 is good choice.

Actually from my experience with several high load XFS/NFS servers, a prime 
number works slightly better:

http://marc.theaimsgroup.com/?l=linux-xfs&m=110785998700647&w=2

...My 5 cents.

-- 
Med venlig hilsen - Best regards - Meilleures salutations

Anders Saaby
Systems Engineer
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Cohaesio A/S - Maglebjergvej 5D - DK-2800 Lyngby
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