From owner-freebsd-bugs Tue May 23 07:04:56 1995 Return-Path: bugs-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id HAA03746 for bugs-outgoing; Tue, 23 May 1995 07:04:56 -0700 Received: from clinet.fi (root@clinet.fi [193.64.6.1]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id HAA03737 for ; Tue, 23 May 1995 07:04:43 -0700 Received: from katiska.clinet.fi (root@katiska.clinet.fi [193.64.6.3]) by clinet.fi (8.6.10/8.6.4) with ESMTP id RAA21057; Tue, 23 May 1995 17:04:18 +0300 From: Heikki Suonsivu Received: (hsu@localhost) by katiska.clinet.fi (8.6.11/8.6.4) id RAA03308; Tue, 23 May 1995 17:04:18 +0300 Date: Tue, 23 May 1995 17:04:18 +0300 Message-Id: <199505231404.RAA03308@katiska.clinet.fi> To: davidg@Root.COM Cc: Heikki Suonsivu , freebsd-bugs@freefall.cdrom.com Subject: Re: kern/435: mb_map full, network starts jumping off and on, finally stays down In-Reply-To: <199505230836.BAA01926@corbin.Root.COM> References: <199505230820.BAA16953@freefall.cdrom.com> <199505230836.BAA01926@corbin.Root.COM> Organization: Helsinki University of Technology, Otaniemi, Finland Sender: bugs-owner@FreeBSD.org Precedence: bulk David Greenman writes: > > P90 as news server plus various other jobs. > ... > >May 23 00:00:32 katiska /kernel: mb_map full > > > >And network interface starts dropping packets. Occasionally a packet > >or two gets through, as sometimes nfs says is alive again, and even a > >login gets though. A couple of hours later the connections die > >completely. > > How many simultaneous TCP connections does the machine typically have, and Haven't counted, now it is about 40 but we are not at the peak hours yet. I would guess it stays less 200, probably less than 100 connections. Even less active connections. > how many mbuf clusters do you have configured in the kernel? Haven't changed the number of MBUFs. maxusers is 256. It still is a problem it the system locks up all IO when mbufs run out, it probably should panic if a critical resource isn't available, though I can see that it isn't easy to know when it did run out all of the available space. But it is the difference between short break and driving 10 miles down there to reboot the damn thing. Linux is particularly bad in these things, I have hardly ever seen it panic, it always locks up either IO or itself, although less often than FreeBSD panics :-(. -- Heikki Suonsivu, T{ysikuu 10 C 83/02210 Espoo/FINLAND, hsu@cs.hut.fi home +358-0-8031121 work -4513377 fax -4555276 riippu SN