linux-ext4 - Re: ext4 unlink performance

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Message-ID: <20081113191000.GA11516@untroubled.org>
Date:	Thu, 13 Nov 2008 13:10:00 -0600
From:	Bruce Guenter <lists-linux-ext4@...ce-guenter.dyndns.org>
To:	linux-ext4@...r.kernel.org
Subject: Re: ext4 unlink performance

On Thu, Nov 13, 2008 at 12:57:12PM -0600, Bruce Guenter wrote:
> Ouch.  Why is ext4 so much slower than ext3 here,

I forgot to mention one important detail.  I started running 'vmstat 5'
during one of the unlink runs, and noticed that there were intervals of
15 or 20 seconds where no blocks were being read or written, and minimal
CPU was being used.  I do not observe the same stalls when using ext3.

-- 
Bruce Guenter <bruce@...roubled.org>                http://untroubled.org/

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