From owner-freebsd-questions@FreeBSD.ORG Tue May 3 21:16:25 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 B8ADF16A4CE for ; Tue, 3 May 2005 21:16:25 +0000 (GMT) Received: from smtpout.mac.com (smtpout.mac.com [17.250.248.45]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5044343D2F for ; Tue, 3 May 2005 21:15:59 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from mac.com (smtpin08-en2 [10.13.10.153]) id j43LD0iJ025490; Tue, 3 May 2005 14:13:00 -0700 (PDT) Received: from [192.168.1.6] (pool-68-161-53-96.ny325.east.verizon.net [68.161.53.96]) (authenticated bits=0)j43LCwXZ012628; Tue, 3 May 2005 14:12:59 -0700 (PDT) In-Reply-To: References: <000601c5500e$85b4f3c0$0a01a8c0@ops.cenergynetworks.com> <20050503204542.GB10776@xor.obsecurity.org> Mime-Version: 1.0 (Apple Message framework v622) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Charles Swiger Date: Tue, 3 May 2005 17:12:57 -0400 To: "Chad Leigh -- Shire.Net LLC" X-Mailer: Apple Mail (2.622) 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 21:16:25 -0000 On May 3, 2005, at 5:02 PM, 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. It's not required, but the system can't write a panic crash dump out unless there is slightly more swap space available than RAM in the box. If your system doesn't crash, and your workload fits into RAM, having gigabytes of swap space set up is not very useful.... -- -Chuck