Date: Tue, 8 Feb 2005 12:07:35 -0800
From: Chris Wedgwood <cw@f00f.org>
To: jon ross <jonross@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: VM disk cache behavior.
Message-ID: <20050208200735.GA24094@taniwha.stupidest.org>
References: <e130a7170502080906596561d7@mail.gmail.com>
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On Tue, Feb 08, 2005 at 12:06:14PM -0500, jon ross wrote:

> I have an app with a small fixed memory footprint that does a lot of
> random reads from a large file. I thought if I added more memory to
> the machine the VM would do more caching of the disk, but added
> memory does not seem to make any difference. I played with some of
> the params in /proc/sys/vm and none of them seem to have any effect.

If the file is much larger than your RAM size and your access really
are random, you're probably SOL as you will be seek/IO bound most of
the time.

How large is the 'large file' ?
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