Date: Tue, 27 Nov 2001 22:40:51 -0700 (MST) From: "Forrest W. Christian" <forrestc@imach.com> To: Kal Torak <kaltorak@quake.com.au> Cc: FreeBSD ISP <freebsd-isp@FreeBSD.ORG> Subject: Re: Whats with this -> sendto: No buffer space available Message-ID: <Pine.BSF.4.21.0111272235100.23294-100000@workhorse.iMach.com> In-Reply-To: <3C046D6A.4080201@quake.com.au>
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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 <kaltorak@quake.com.au> > To: Forrest W. Christian <forrestc@imach.com> > Cc: FreeBSD ISP <freebsd-isp@FreeBSD.ORG> > 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
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