From owner-freebsd-isp Tue Nov 27 21:45:24 2001 Delivered-To: freebsd-isp@freebsd.org Received: from workhorse.iMach.com (workhorse.iMach.com [206.127.77.89]) by hub.freebsd.org (Postfix) with ESMTP id 6FF1B37B405 for ; Tue, 27 Nov 2001 21:45:18 -0800 (PST) Received: from localhost (forrestc@localhost) by workhorse.iMach.com (8.9.3/8.9.3) with ESMTP id WAA23309; Tue, 27 Nov 2001 22:40:51 -0700 (MST) Date: Tue, 27 Nov 2001 22:40:51 -0700 (MST) From: "Forrest W. Christian" To: Kal Torak Cc: FreeBSD ISP Subject: Re: Whats with this -> sendto: No buffer space available In-Reply-To: <3C046D6A.4080201@quake.com.au> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Actually, if you haven't rebooted, netstat -m should show the maximum number of mbufs which have been used (also look at mbuf clusters). Filling mbufs/mbuf clusters are sometimes a sign of a bigger problem - such as packet loss caused by something misconfigured in the path. If you've got a lot of flows going into a box (such as for a mail server), I can almost guarantee that the out-of-the-box tuning is too small. In addition, if you have tuned tcpip to permit a larger window size, it tends to eat mbufs. This can also be caused my a buggy driver/card. 3com cards have been known to have this problem recently (along with others at various other times). On Wed, 28 Nov 2001, Kal Torak wrote: > Date: Wed, 28 Nov 2001 15:51:54 +1100 > From: Kal Torak > To: Forrest W. Christian > Cc: FreeBSD ISP > Subject: Re: Whats with this -> sendto: No buffer space available > > Forrest W. Christian wrote: > > > What does a netstat -m show when this occurs? > > > > I suspect you don't have enough mbufs. > > > Yeah, I was thinking of just putting maxusers up to 60 > or something and see if it goes away... > > Just seems strange that there wouldnt be enough, because > there really isnt that much traffic going through it!! > > Other people are seeing simmilar things here, are we all > lacking mbufs or is there something else happining here? > > I havent really noticed any loss of sync on the modem, > but I have never actualy been sitting here using the system > when its happened... Could it be an issue with the isp? I > dont see how there end could cause us to run out of mbufs... > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > - Forrest W. Christian (forrestc@imach.com) AC7DE ---------------------------------------------------------------------- The Innovation Machine Ltd. P.O. Box 5749 http://www.imach.com/ Helena, MT 59604 Home of PacketFlux Technogies and BackupDNS.com (406)-442-6648 ---------------------------------------------------------------------- Protect your personal freedoms - visit http://www.lp.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message