Date: Tue, 10 Nov 1998 17:12:05 +0100 From: Eivind Eklund <eivind@yes.no> To: Gary Palmer <gpalmer@FreeBSD.ORG>, Alfred Perlstein <bright@hotjobs.com> Cc: Phil Regnauld <regnauld@EU.org>, alk@pobox.com, current@FreeBSD.ORG Subject: Re: The infamous dying daemons bug Message-ID: <19981110171205.19613@follo.net> In-Reply-To: <3636.910712627@gjp.erols.com>; from Gary Palmer on Tue, Nov 10, 1998 at 10:43:47AM -0500 References: <Pine.BSF.4.05.9811100914130.343-100000@porkfriedrice.ny.genx.net> <3636.910712627@gjp.erols.com>
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On Tue, Nov 10, 1998 at 10:43:47AM -0500, Gary Palmer wrote: > Alfred Perlstein wrote in message ID > <Pine.BSF.4.05.9811100914130.343-100000@porkfriedrice.ny.genx.net>: > > > > Now that i think about it i have had the: > > > > /kernel: swap_pager: suggest more swap space: 254 MB > > > > unsure about the number, but in my case i didn't notice anything flaky > > about my system afterwards. > > John Dyson added this warning a few months ago, and the times that > I've seen it are when the machine *just* starts hitting swap space, > and is no-where near running out. No offense to John, but I don't > think that whatever algorythm he uses in generating that message is > anywhere near to being right, and I wonder what peoples opinions about > either hiding it behind bootverbose or removing it are? Based on my reading of the code (and I don't fully understand the VM code, so this may be a wrong analysis): That message seems to be very right. It seems to come when we get into a 'memory overcommit' situation (ie, there isn't enough swap to satify your memory use if you dirty all pages). It suggest adding twice as much swap space as what we overcommit. It may be that we should re-phrase it to something like "Overcommitting %dMB of memory. This message will only be shown once." or similar, though. Eivind. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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