From owner-freebsd-stable Sat Oct 7 11:10:49 2000 Delivered-To: freebsd-stable@freebsd.org Received: from rover.village.org (rover.village.org [204.144.255.49]) by hub.freebsd.org (Postfix) with ESMTP id C7E8537B66D for ; Sat, 7 Oct 2000 11:10:46 -0700 (PDT) Received: from harmony.village.org (harmony.village.org [10.0.0.6]) by rover.village.org (8.11.0/8.11.0) with ESMTP id e97IAjd00984; Sat, 7 Oct 2000 12:10:45 -0600 (MDT) (envelope-from imp@harmony.village.org) Received: from harmony.village.org (localhost.village.org [127.0.0.1]) by harmony.village.org (8.9.3/8.8.3) with ESMTP id MAA01453; Sat, 7 Oct 2000 12:10:44 -0600 (MDT) Message-Id: <200010071810.MAA01453@harmony.village.org> To: Bill Moran Subject: Re: `time make buildworld' Cc: FreeBSD Stable In-reply-to: Your message of "Sat, 07 Oct 2000 10:39:03 EDT." <39DF3587.3C2BA373@columbus.rr.com> References: <39DF3587.3C2BA373@columbus.rr.com> <39DECC00.71E81EF1@urx.com> <20001007101732.A91198@freebie.demon.nl> Date: Sat, 07 Oct 2000 12:10:44 -0600 From: Warner Losh Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In message <39DF3587.3C2BA373@columbus.rr.com> Bill Moran writes: : Just to add to this, I've done some very limited experiments with : softupdates and my conclusion is that running softupdates on systems : with low RAM is a very bad idea (tm) as it hurts performance badly. On : systems with a more reasonable amount of RAM it's an improvement. : I say limited tests because I haven't run the same machine with : low/sufficient RAM to verify that it's the RAM that causes the : slowdown, but it makes sense. I know that softupdates on my 16MB OpenBSD/arc system trippled the make build time from 26 hours to 76. When I put 16MB more into that machine, for a total of 32MB, the build world time with stoft updates and without droped to 21 and 19 respectively. When I put another 32MB into the machine (to max it out), the build world time dropped another hour or so (17.5 with soft updates, 20.5 without). On a 8MB system, I'd recommend against softupdates. They need a lot of RAM to be useful. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message