Date: Sat, 07 Oct 2000 12:10:44 -0600 From: Warner Losh <imp@village.org> To: Bill Moran <wmoran@columbus.rr.com> Cc: FreeBSD Stable <stable@FreeBSD.org> Subject: Re: `time make buildworld' Message-ID: <200010071810.MAA01453@harmony.village.org> 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> <Pine.BSF.4.21.0010070011530.84656-100000@fremont.bolingbroke.com> <20001007101732.A91198@freebie.demon.nl>
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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
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