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Re: Improving XFS file system inode performance

To: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>
Subject: Re: Improving XFS file system inode performance
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Wed, 24 Nov 2010 07:39:06 +1100
Cc: xfs@xxxxxxxxxxx, Jesse Stroik <jstroik@xxxxxxxxxxxxx>
In-reply-to: <201011232127.37796@xxxxxx>
References: <4CEAE7D7.6050401@xxxxxxxxxxxxx> <20101122234419.GK13830@dastard> <4CEBD47F.1040004@xxxxxxxxxxxxx> <201011232127.37796@xxxxxx>
User-agent: Mutt/1.5.20 (2009-06-14)
On Tue, Nov 23, 2010 at 09:27:36PM +0100, Michael Monnerie wrote:
> On Dienstag, 23. November 2010 Jesse Stroik wrote:
> > As this file system is likely to continue to increase in number of
> > files  at a fairly rapid rate, we're going to need a long term
> > strategy.  I suspect it may be necessary in the near future to
> > double or quadruple the memory to 32GB or 64GB, but the uncertainty
> > in the formula makes me nervous.
> 
> Using tools like "munin" helps you see the problem in graphs, so you can 
> easily check what's going on. Munin draws graphs from a lot of 
> parameters of a system, and helped me find problems that you couldn't 
> find otherwise.

For XFS specific stats, PCP is your friend. It knows all about the
stats in /proc/fs/xfs/stats as well as most system level stats that
other toolѕ also collect and display...

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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