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From: Greg Smith <gsmith@gregsmith.com>
To: pgsql-performance@postgresql.org
Subject: Re: Linux mis-reporting memory
Date: Fri, 21 Sep 2007 15:24:06 -0400 (EDT)
Message-ID: <Pine.GSO.4.64.0709211502010.23802@westnet.com> (raw)
In-Reply-To: <20070920230400.GM95343@decibel.org>
References: <20070920230400.GM95343@decibel.org>

On Thu, 20 Sep 2007, Decibel! wrote:

> I'm finding this rather interesting report from top on a Debian box... 
> how is it that linux thinks that 30G is cached?

top on Linux gives weird results when faced with situations where there's 
shared memory involved.  I look at /proc/meminfo and run ipcs when I want 
a better idea what's going on.  As good of an article on this topic as 
I've found is http://gentoo-wiki.com/FAQ_Linux_Memory_Management which 
recommends using free to clarify how big the disk cache really is.

--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD



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