From owner-freebsd-current Tue Nov 10 08:23:48 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id IAA11507 for freebsd-current-outgoing; Tue, 10 Nov 1998 08:23:48 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from ns1.yes.no (ns1.yes.no [195.204.136.10]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id IAA11501; Tue, 10 Nov 1998 08:23:39 -0800 (PST) (envelope-from eivind@bitbox.follo.net) Received: from bitbox.follo.net (bitbox.follo.net [195.204.143.218]) by ns1.yes.no (8.9.1a/8.9.1) with ESMTP id RAA00162; Tue, 10 Nov 1998 17:12:07 +0100 (CET) Received: (from eivind@localhost) by bitbox.follo.net (8.8.8/8.8.6) id RAA20835; Tue, 10 Nov 1998 17:12:06 +0100 (MET) Message-ID: <19981110171205.19613@follo.net> Date: Tue, 10 Nov 1998 17:12:05 +0100 From: Eivind Eklund To: Gary Palmer , Alfred Perlstein Cc: Phil Regnauld , alk@pobox.com, current@FreeBSD.ORG Subject: Re: The infamous dying daemons bug References: <3636.910712627@gjp.erols.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.89.1i In-Reply-To: <3636.910712627@gjp.erols.com>; from Gary Palmer on Tue, Nov 10, 1998 at 10:43:47AM -0500 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Tue, Nov 10, 1998 at 10:43:47AM -0500, Gary Palmer wrote: > Alfred Perlstein wrote in message ID > : > > > > 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