From owner-freebsd-questions@FreeBSD.ORG Wed Sep 2 12:33:50 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 48387106566B for ; Wed, 2 Sep 2009 12:33:50 +0000 (UTC) (envelope-from wmoran@potentialtech.com) Received: from mail.potentialtech.com (internet.potentialtech.com [66.167.251.6]) by mx1.freebsd.org (Postfix) with ESMTP id 1B51F8FC1E for ; Wed, 2 Sep 2009 12:33:50 +0000 (UTC) Received: from localhost (pr40.pitbpa0.pub.collaborativefusion.com [206.210.89.202]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.potentialtech.com (Postfix) with ESMTPSA id 69F57EBC0A; Wed, 2 Sep 2009 08:33:49 -0400 (EDT) Date: Wed, 2 Sep 2009 08:33:48 -0400 From: Bill Moran To: Per olof Ljungmark Message-Id: <20090902083348.40c21529.wmoran@potentialtech.com> In-Reply-To: <4A9DB590.6080605@intersonic.se> References: <4A9D8057.8020307@intersonic.se> <20090901162931.d85ec256.wmoran@potentialtech.com> <20090901204147.GC2855@dan.emsphone.com> <4A9DB590.6080605@intersonic.se> Organization: Bill Moran X-Mailer: Sylpheed 2.7.1 (GTK+ 2.16.5; i386-portbld-freebsd7.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: memory usage displsy X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 02 Sep 2009 12:33:50 -0000 In response to Per olof Ljungmark : > Dan Nelson wrote: > > In the last episode (Sep 01), Bill Moran said: > >> In response to Per olof Ljungmark : > >>> What is a good way to find out how memory is used? Have a 6.4 box where > >>> memory is used by something but I fail to see what is using it - tried > >>> different switches to ps(1), tried the stat tools but a big chunk of > >>> memory does not show at all. > >>> > >>> A proper tool for analyzing memory usage "live", this is a production > >>> box? > >> I've always been able to get what I need from top. You can do -o res to > >> sort by resident memory usage, which helps. > > > > ps will sort by memory usage when given the -m flag. Also check ipcs -a to > > see if there are any sysv shared memory segments hanging arnound. If you > > don't see anything using the memory, where are you seeing that "something" > > is using it? > > > > ...and here is top output after I stopped Postfix, slapd and Cyrus-IMAP. > Still over 3G Active. You did not sort by res and there are only 40 processes showing, which means your output is truncated and may have truncated the problematic process. Please use "top -o res" to get the output sorted by memory usage, or don't truncate the output (former preferred). Also, please provide the output of "ipcs -a" -- Bill Moran http://www.potentialtech.com http://people.collaborativefusion.com/~wmoran/