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From: Dave Chinner <david@fromorbit.com>
To: Michael Weissenbacher <mw@dermichi.com>
Cc: xfs@oss.sgi.com
Subject: Re: logbufs default value
Date: Tue, 31 May 2011 10:11:27 +1000	[thread overview]
Message-ID: <20110531001127.GF561@dastard> (raw)
In-Reply-To: <4DE0A80C.7060806@dermichi.com>

On Sat, May 28, 2011 at 09:45:16AM +0200, Michael Weissenbacher wrote:
> Hi List!
> From linux-2.6.39/Documentation/filesystems/xfs.txt:
>   logbufs=value
>         Set the number of in-memory log buffers.  Valid numbers range
>         from 2-8 inclusive.
>         The default value is 8 buffers for filesystems with a
>         blocksize of 64KiB, 4 buffers for filesystems with a blocksize
>         of 32KiB, 3 buffers for filesystems with a blocksize of 16KiB
>         and 2 buffers for all other configurations.  Increasing the
>         number of buffers may increase performance on some workloads
>         at the cost of the memory used for the additional log buffers
>         and their associated control structures.
> 
> Is this still valid? I thought that newer kernels would always use 8 as
> default?

No, it's not. Patches to fix the documentation are welcome.

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

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      reply	other threads:[~2011-05-31  0:11 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-28  7:45 logbufs default value Michael Weissenbacher
2011-05-31  0:11 ` Dave Chinner [this message]

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