From: Adam Tauno Williams <adamtaunowilliams@gmail.com>
To: pgsql-performance@postgresql.org
Subject: Re: Linux mis-reporting memory
Date: Thu, 20 Sep 2007 20:22:36 -0400
Message-ID: <1190334156.6835.1.camel@aleph.wmmi.net> (raw)
In-Reply-To: <20070920230400.GM95343@decibel.org>
References: <20070920230400.GM95343@decibel.org>
> Sorry, I know this is probably more a linux question, but I'm guessing
> that others have run into this...
> I'm finding this rather interesting report from top on a Debian box...
> Mem: 32945280k total, 32871832k used, 73448k free, 247432k buffers
> Swap: 1951888k total, 42308k used, 1909580k free, 30294300k cached
> This is a machine that's been up some time and the database is 400G, so
> I'm pretty confident that shared_buffers (set to 8G) should be
> completely full, and that's what that top process is indicating.
Nope, use "ipcs" to show allocated shared memory segments.
One of the better articles on LINUX & memory management -
http://virtualthreads.blogspot.com/2006/02/understanding-memory-usage-on-linux.html
--
Adam Tauno Williams, Network & Systems Administrator
Consultant - http://www.whitemiceconsulting.com
Developer - http://www.opengroupware.org
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To: pgsql-performance@postgresql.org
Cc: adamtaunowilliams@gmail.com
Subject: Re: Linux mis-reporting memory
In-Reply-To: <1190334156.6835.1.camel@aleph.wmmi.net>
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