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Subject: Re: how to empty buffers/cache?
From: Soeren Sonnenburg <kernel@nn7.de>
To: Alejandro Riveira =?ISO-8859-1?Q?Fern=E1ndez?= 
	<ariveira@gmail.com>,
       "Carlos R\. Mafra" <crmafra2@gmail.com>
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Date: Tue, 13 May 2008 18:58:16 +0200
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On Sat, 2008-05-10 at 00:11 +0200, Alejandro Riveira Fernández wrote:
> El Fri, 09 May 2008 21:49:47 +0000
> Soeren Sonnenburg <kernel@nn7.de> escribió:
> 
> > Dear all,
> > 
> > I am trying to perform some benchmarks that involve reading the same big
> > file a couple of times from disk. However I would want to make sure that
> > the file is not buffered/cached by the kernel when I read the file a
> > second/third/etc time.
> > 
> > Is there a way (except rebooting/unmounting the disk) to clear the
> > buffers?
> 
>  echo 3  > /proc/sys/vm/drop_caches IIRC

thank you both very much ( echo 3 > ... is what I was looking for)

Soeren