From owner-freebsd-questions@FreeBSD.ORG Tue May 3 21:16:00 2005 Return-Path: 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 5390616A4CE for ; Tue, 3 May 2005 21:16:00 +0000 (GMT) Received: from hobbiton.shire.net (hobbiton.shire.net [166.70.252.250]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1816043D7E for ; Tue, 3 May 2005 21:15:59 +0000 (GMT) (envelope-from chad@shire.net) Received: from [67.161.222.227] (helo=[192.168.99.68]) by hobbiton.shire.net with esmtpsa (TLSv1:RC4-SHA:128) (Exim 4.43) id 1DT4kF-000515-CN; Tue, 03 May 2005 15:15:55 -0600 In-Reply-To: <20050503210743.GA11371@xor.obsecurity.org> References: <000601c5500e$85b4f3c0$0a01a8c0@ops.cenergynetworks.com> <20050503204542.GB10776@xor.obsecurity.org> <20050503210743.GA11371@xor.obsecurity.org> Mime-Version: 1.0 (Apple Message framework v728) Message-Id: <2491CCFD-B6DD-4A29-8023-9E46891DC7A2@shire.net> From: "Chad Leigh -- Shire.Net LLC" Date: Tue, 3 May 2005 15:15:54 -0600 To: Kris Kennaway X-Mailer: Apple Mail (2.728) X-SA-Exim-Connect-IP: 67.161.222.227 X-SA-Exim-Mail-From: chad@shire.net Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 3.0.0 (2004-09-13) on hobbiton.shire.net X-Spam-Status: No, score=-0.1 required=5.0 tests=AWL,BAYES_50 autolearn=disabled version=3.0.0 X-Spam-Level: X-SA-Exim-Version: 4.1+cvs (built Mon, 23 Aug 2004 08:44:05 -0700) X-SA-Exim-Scanned: Yes (on hobbiton.shire.net) cc: FreeBSD Mailing List Subject: Re: swap space X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 May 2005 21:16:00 -0000 On May 3, 2005, at 3:07 PM, Kris Kennaway wrote: > On Tue, May 03, 2005 at 03:02:11PM -0600, Chad Leigh -- Shire.Net > LLC wrote: > >> >> On May 3, 2005, at 2:45 PM, Kris Kennaway wrote: >> >>> Since it's a pain to add swap later you want to make >>> allowances for future expansion (e.g. you'd need 32GB of swap if you >>> ever plan to add 32GB of RAM). >>> >> >> I understand that people recommend as much swap as you have ram or >> more. However, is this required and why? I have a dual opteron >> system running i386 5.3-release (with released patches) and it has >> 4GB RAM and only 2GB of swap, which is hardly ever touched, and when >> it is, just in small amounts. >> >> Why is this a problem? (If it ever needs the 2gb of swap I am in >> trouble as the load at that time would be sky high and the machine >> not really responsive anyway) >> > > I explained in my email..you need it to dump the kernel. > Thanks! Well, on my production system, I am not dumping any kernels. Once It crashes, I reboot it and go back into production. Anything dumped would get wiped out. Luckily I am pretty conservative and only move to new versions of the OS when they have been released a while and so my machines have not had panics in years. Thanks Chad