From owner-freebsd-questions@FreeBSD.ORG Wed Jun 6 11:36:13 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3BD1216A475 for ; Wed, 6 Jun 2007 11:36:13 +0000 (UTC) (envelope-from teklimbu@wlink.com.np) Received: from smtp5.wlink.com.np (smtp5.wlink.com.np [202.79.32.52]) by mx1.freebsd.org (Postfix) with SMTP id AC4AD13C4BB for ; Wed, 6 Jun 2007 11:36:06 +0000 (UTC) (envelope-from teklimbu@wlink.com.np) Received: (qmail 24490 invoked from network); 6 Jun 2007 11:36:02 -0000 Received: from unknown (HELO smtp1.wlink.com.np) (202.79.32.76) by 0 with SMTP; 6 Jun 2007 11:36:02 -0000 Received: (qmail 32495 invoked by uid 98); 6 Jun 2007 11:36:02 -0000 Received: from 202.79.36.216 by smtp1.wlink.com.np (envelope-from , uid 1009) with qmail-scanner-1.25 (clamdscan: 0.88.4/2205. Clear:RC:1(202.79.36.216):. Processed in 0.041582 secs); 06 Jun 2007 11:36:02 -0000 X-Qmail-Scanner-Mail-From: teklimbu@wlink.com.np via smtp1.wlink.com.np X-Qmail-Scanner: 1.25 (Clear:RC:1(202.79.36.216):. Processed in 0.041582 secs) Received: from [202.79.36.216] (HELO [192.168.100.3]) by smtp1.wlink.com.np (qmail-smtpd) with SMTP; 06 Jun 2007 11:36:01 -0000 (Wed, 06 Jun 2007 17:21:01 +0545) Message-ID: <46669C32.5010309@wlink.com.np> Date: Wed, 06 Jun 2007 17:21:18 +0545 From: Tek Bahadur Limbu User-Agent: Thunderbird 1.5.0.12 (Windows/20070509) MIME-Version: 1.0 To: Nicole Harrington References: <661463.95597.qm@web34503.mail.mud.yahoo.com> In-Reply-To: <661463.95597.qm@web34503.mail.mud.yahoo.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Check-By: smtp1.wlink.com.np Spam: No ; 1.1 / 7.0 X-Spam-Status-WL: No, hits=1.1 required=7.0 Cc: freebsd-questions@freebsd.org Subject: Re: How to solve mysterious system lockups? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Jun 2007 11:36:13 -0000 Nicole Harrington wrote: > Hello > I have several systems that are used as squid > caching servers. I have some systems that use SCSI > disks and some that use SATA disks. They are > identical in everyway except for the sata vs SCSI > drives. > > At random times, the sata based systems seem to be > freezing. You can ping them and they respond, but you > cannot log in. Nor are any logs processed during that > time. > > I figure it mist be something to do with the disks, > but I am not sure how to solve it. There seems to be > little rhyme or reason. It does not happen necessarily > during busy times. It can happen in the middle of the > night. > > Any pointers in how to track down the cause would be > much appreciated. > > Tyan S2881 Motherboard - 4gigs mem > Using 4 SATA (or scsi) drives > FreeBSD 6.2-STABLE. Hi Nicole, I had once experienced the same problem of system lockups in my FreeBSD-6.x servers running Squid. Most of them used SATA disks. I could ping the servers but could not SSH into them. It seemed as tcp connections had stopped in the servers. However, my problem was caused by high mbufs usage. What do you get from the following commands? netstat -mb sysctl kern.ipc.nmbclusters Try increasing your mbufs if in case they are too low. But your problem might not be related to mbufs and sockets. Thanking you... > > Thanks! > > Nicole > > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" > > >