From owner-freebsd-questions Wed Aug 11 22: 4:10 1999 Delivered-To: freebsd-questions@freebsd.org Received: from posgate.acis.com.au (posgate.acis.com.au [203.14.230.14]) by hub.freebsd.org (Postfix) with ESMTP id 5DBCE14C1C for ; Wed, 11 Aug 1999 22:03:56 -0700 (PDT) (envelope-from andymac@bullseye.apana.org.au) Received: from bullseye.apana.org.au (uucp@localhost) by posgate.acis.com.au (8.9.2/8.9.2/Debian/GNU) with UUCP id OAA32552; Thu, 12 Aug 1999 14:55:06 +1000 (EST) Received: from bullseye.apana.org.au (central.apana.org.au [203.9.107.245]) by bullseye.apana.org.au (8.8.8/8.8.8) with SMTP id JAA24063; Thu, 12 Aug 1999 09:31:50 +1000 (EST) (envelope-from andymac@bullseye.apana.org.au) Date: Thu, 12 Aug 1999 09:22:02 +1000 (EST) From: Andrew MacIntyre To: Greg Lewis Cc: lyz@ems.guangzhou.gd.cn, freebsd-questions@FreeBSD.ORG Subject: Re: SMP and MEM In-Reply-To: <199908110647.QAA81698@ares.maths.adelaide.edu.au> Message-ID: X-X-Sender: andymac@bullseye.apana.org.au MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wed, 11 Aug 1999, Greg Lewis wrote: > > 2. The other question is my compaq 3000 server down again and again when MEM > > increase to 1 G. > > I have set the option in kernel like this: > > > > > > options "MAXMEM=(1024*1024)" > > > > > > appreciate for your help. > > Right. So you've compiled a kernel which insists that your machine has > 1G of physical RAM yet you state above that it has 512 M. I'm guessing > this is a Bad Thing [TM]. You only need to specify MAXMEM if FreeBSD > isn't detecting the amount of RAM you have correctly. Compaqs are a PITA. You have to do this to get any more than 16M usable. I did think that the startup code still checked how much memory actually existed (why is it called _MAX_MEM?). There has however been an extensive thread in the last day or two on a similar issue, with the observation that FreeBSD is known to work reliably on machines with 1G of real memory, but that considerable care/knowledge is required to find the right memory to actually get a reliable system with 1G. There seem to be lots of electrical and memory spec gotchas for many motherboards that claim to support this much memory. -- Andrew I MacIntyre "These thoughts are mine alone..." E-mail: andrew.macintyre@aba.gov.au (work) | Snail: PO Box 370 andymac@bullseye.apana.org.au (play) | Belconnen ACT 2616 Fido: Andrew MacIntyre, 3:620/243.18 | Australia To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message