From owner-freebsd-questions@FreeBSD.ORG  Fri Sep 12 09:39:57 2003
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 0741916A4BF
	for <freebsd-questions@freebsd.org>;
	Fri, 12 Sep 2003 09:39:57 -0700 (PDT)
Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 4689B43FDF
	for <freebsd-questions@freebsd.org>;
	Fri, 12 Sep 2003 09:39:56 -0700 (PDT)
	(envelope-from dan@dan.emsphone.com)
Received: (from dan@localhost)
	by dan.emsphone.com (8.12.9/8.12.9) id h8CGdsfV007376;
	Fri, 12 Sep 2003 11:39:54 -0500 (CDT)
	(envelope-from dan)
Date: Fri, 12 Sep 2003 11:39:54 -0500
From: Dan Nelson <dnelson@allantgroup.com>
To: Jesse Guardiani <jesse@wingnet.net>
Message-ID: <20030912163954.GC61528@dan.emsphone.com>
References: <bjqs64$6i9$1@sea.gmane.org>
	<20030911231742.GA61528@dan.emsphone.com> <bjsjdd$vgh$2@sea.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <bjsjdd$vgh$2@sea.gmane.org>
X-OS: FreeBSD 5.1-CURRENT
X-message-flag: Outlook Error
User-Agent: Mutt/1.5.4i
cc: freebsd-questions@freebsd.org
Subject: Re: `top` process memory usage: SIZE vs RES
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 12 Sep 2003 16:39:57 -0000

In the last episode (Sep 12), Jesse Guardiani said:
> Dan Nelson wrote:
> > In the last episode (Sep 11), Jesse Guardiani said:
> >  
> >> 2.) What, exactly, is RES? `man top` describes it as this:
> >>     "RES is the current amount of resident memory", but does
> >>     that mean RES is included in SIZE? Or does that mean that
> >>     RES should be counted in addition to SIZE?
> > 
> > RES the amount of SIZE that it currently in core
> 
> OK. To clarify, you mean core kernel memory here?
> If so, how is that significant? Why should I care?
> 
> In other words, why would I ever want to know that?

core meaning physical memory; user memory in this case.  Processes can
lock kernel memory, but there's no easy way of listing that (it's
usually a small amount held in pipe or socket buffers and is
short-lived). The name "core" came from when memory bits were ferrite
rings magnetized by wires running through them.

http://www.columbia.edu/acis/history/core.html

-- 
	Dan Nelson
	dnelson@allantgroup.com