From owner-freebsd-smp Wed Feb 20 1:46:46 2002 Delivered-To: freebsd-smp@freebsd.org Received: from turbo.dreamtime.net (dreamtime.net [209.61.206.24]) by hub.freebsd.org (Postfix) with ESMTP id 6A24B37B402 for ; Wed, 20 Feb 2002 01:46:41 -0800 (PST) Received: from stephenyrpi344 (lsanca1-ar8-120-154.lsanca1.dsl.gtei.net [4.35.120.154]) by turbo.dreamtime.net (8.11.1/8.11.1) with SMTP id g1K9kxP93641; Wed, 20 Feb 2002 04:47:00 -0500 (EST) (envelope-from clients@dreamtime.net) From: "Dreamtime.net Inc." To: "Terry Lambert" , "Vincent Janelle" Cc: Subject: RE: Systat and Ram Date: Wed, 20 Feb 2002 01:46:43 -0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) In-Reply-To: <3C736028.FBD0F093@mindspring.com> Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Actually, we need to run anywhere from 30 to 300 httpd processes, 20-25 megs each. We want to know how can we decide if we need more RAM based on 'systat' output. Sincerely, Stephen > -----Original Message----- > From: Terry Lambert [mailto:tlambert2@mindspring.com] > Sent: Wednesday, February 20, 2002 12:37 AM > To: Vincent Janelle > Cc: Dreamtime.net Inc.; freebsd-smp@FreeBSD.ORG > Subject: Re: Systat and Ram > > > Vincent Janelle wrote: > > Then you need something other than x86, because intel platforms > > only support 4GB (unless you're using PSE, but each process is > > still only limited to 4GB). > > > > If you need more than this you need to research other platforms > > such as alpha, sparc, sgi mips, itanium, etc which provide a > > 64bit address space and systems with support for greater than 4GB. > > You mean PAE (Page Address Extension), not PSE (Page Size > Extension). The PSE is use to get 4M and other page sizes > between 4M and 4K. > > Really, he ought to be reconsidering why he believes his > application needs more than 4G of physical RAM, and whether > he can achieve the same effect with a cluster. If that's > impossible, then and only then should he look at another > architecture, IMO. > > -- Terry > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message