From owner-freebsd-questions Mon Dec 6 14:22:25 1999 Delivered-To: freebsd-questions@freebsd.org Received: from vapor.westin16.flyingcroc.net (vapor.westin16.flyingcroc.net [207.246.128.125]) by hub.freebsd.org (Postfix) with ESMTP id 4C3DB14F88 for ; Mon, 6 Dec 1999 14:22:20 -0800 (PST) (envelope-from myc@vapor.westin16.flyingcroc.net) Received: from localhost (myc@localhost) by vapor.westin16.flyingcroc.net (8.9.3/8.9.3) with ESMTP id OAA56368; Mon, 6 Dec 1999 14:18:42 -0800 (PST) (envelope-from myc@vapor.westin16.flyingcroc.net) Date: Mon, 6 Dec 1999 14:18:42 -0800 (PST) From: Mychal McGrew X-Sender: myc@vapor.westin16.flyingcroc.net To: Alfred Perlstein Cc: Doug Luce , freebsd-questions@FreeBSD.ORG Subject: Re: Kernel dumps not happening! In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Doug, I've experienced this problem before on machines with high loads. It runs out of MBUFS, and just dumps. This is the line that I put in my kernel and recompiled: options NMBCLUSTERS=30720 This may be too many for your machine to handle, but I'm not sure. Regards, Mychal L. McGrew UNIX Systems Administrator Flying Crocodile, Inc. http://www.flyingcroc.com myc@nethead.com On Mon, 6 Dec 1999, Alfred Perlstein wrote: > On Mon, 6 Dec 1999, Doug Luce wrote: > > > Hello! > > > > I'm getting a message at crash time: > > > > Nov 29 16:54:23 tango /kernel: Out of mbuf clusters - increase maxusers! > > > > Followed shortly on bootup by: > > > > Nov 29 17:04:57 tango savecore: no core dump > > > > My question: why the hell isn't there a core dump? > > I'm going to try some assuptions here: > > a) you're running 2.2.x and haven't upgraded to 3.x means that you are > experiancing this problem on a production box that you can't upgrade. > b) you really don't care about the crashdump, you just want the box to > stop rebooting. :) > > I would take the advice given by the kernel, increase maxusers and compile > a new kernel, if maxusers is already very high you may want to fiddle with > NMBCLUSTERS, do a search of the mailing lists for NMBCLUSTER guidlines. > > > I believe I've followed all the necessary steps to ensure a dump. Here's > > some sysctl output: > > > > machdep.do_dump: 1 > > kern.dumpdev: { major = 4, minor = 131073 } > > > > >From rc.conf: > > > > dumpdev="/dev/sd0s1b" > > > > And that device: > > > > brw-r----- 1 root operator 4, 0x00020001 Apr 15 1999 /dev/sd0s1b > > > > Here's pstat -s: > > > > Device 512-blocks Used Avail Capacity Type > > /dev/sd0s1b 2048000 15728 2032144 1% Interleaved > > > > So what's going on? This is on a 2.2.8 release. Anyone know of a stock > > problem with it? > > If you could I would at least upgrade this to a 2.2-stable release using > cvsup set your tag to RELENG_2_2 for your source dir. > > -Alfred > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message