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Re: [PATCH] Give logbufs a better default

To: Steve Lord <lord@xxxxxxx>
Subject: Re: [PATCH] Give logbufs a better default
From: Chris Wedgwood <cw@xxxxxxxx>
Date: Tue, 17 Jun 2003 08:10:06 -0500
Cc: Andi Kleen <ak@xxxxxxx>, linux-xfs@xxxxxxxxxxx, Chris Mason <mason@xxxxxxxx>
In-reply-to: <1055369055.6611.95.camel@jen.americas.sgi.com>
References: <20030611093525.GA2329@wotan.suse.de> <1055363594.6614.44.camel@jen.americas.sgi.com> <20030611212822.GA8166@wotan.suse.de> <1055369055.6611.95.camel@jen.americas.sgi.com>
Sender: linux-xfs-bounce@xxxxxxxxxxx
On Wed, Jun 11, 2003 at 05:04:15PM -0500, Steve Lord wrote:

> > 8 is the current maximum (is there a reason for that btw? could it
> > be simply raised?)
>
> It could be.

I have a filesystem with an external log where I've increase logbufs
to 8 and also the size to 256k.

With this I see *much* better performance for somethings like cp -Rl
and rm, but not reliably...  there are times when the performance is
worse.

It's not clear how to choose sensible values other than by trial and
error.


  --cw


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