Date: Mon, 6 Dec 1999 14:18:42 -0800 (PST) From: Mychal McGrew <myc@vapor.westin16.flyingcroc.net> To: Alfred Perlstein <bright@wintelcom.net> Cc: Doug Luce <doug@freebsd.con.com>, freebsd-questions@FreeBSD.ORG Subject: Re: Kernel dumps not happening! Message-ID: <Pine.BSF.4.20.9912061416320.46403-100000@vapor.westin16.flyingcroc.net> In-Reply-To: <Pine.BSF.4.21.9912061436390.4557-100000@fw.wintelcom.net>
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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
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