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Date: Wed, 29 Sep 2010 12:42:30 +0100
From: Bruce Cran <bruce@cran.org.uk>
To: Bas Smeelen <b.smeelen@ose.nl>
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Cc: freebsd-questions@freebsd.org, vyaaghrah-nix@yahoo.com
Subject: Re: Cache Memory in top command
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On Wed, 29 Sep 2010 08:57:09 +0200
Bas Smeelen <b.smeelen@ose.nl> wrote:

>  *Cache:* number of clean pages caching data that are available for
> immediate reallocation
> http://www.freebsd.org/cgi/man.cgi?query=top&sektion=1
> <http://www.freebsd.org/cgi/man.cgi?query=top&sektion=1>

I believe the "Cache" value is almost totally unrelated to the
amount of memory used for caching: FreeBSD has a unified buffer cache
so any memory is available for use as cache. Unlike Linux, you can't
look at the line in 'top' to see how much memory is being used for
buffers and cache.

You can find more information about the VM architecture at
http://www.freebsd.org/doc/en/books/arch-handbook/vm.html .

-- 
Bruce Cran