From owner-freebsd-net@FreeBSD.ORG Sun Nov 30 05:18:29 2008 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1D79B1065670 for ; Sun, 30 Nov 2008 05:18:29 +0000 (UTC) (envelope-from sam@freebsd.org) Received: from ebb.errno.com (ebb.errno.com [69.12.149.25]) by mx1.freebsd.org (Postfix) with ESMTP id EA7358FC18 for ; Sun, 30 Nov 2008 05:18:28 +0000 (UTC) (envelope-from sam@freebsd.org) Received: from trouble.errno.com (trouble.errno.com [10.0.0.248]) (authenticated bits=0) by ebb.errno.com (8.13.6/8.12.6) with ESMTP id mAU5IS1A090955 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 29 Nov 2008 21:18:28 -0800 (PST) (envelope-from sam@freebsd.org) Message-ID: <49322224.8010806@freebsd.org> Date: Sat, 29 Nov 2008 21:18:28 -0800 From: Sam Leffler Organization: FreeBSD Project User-Agent: Thunderbird 2.0.0.9 (X11/20071125) MIME-Version: 1.0 To: Mykel References: <4931A5B6.1060000@mWare.ca> <49321494.90706@elischer.org> <49321EE2.6020001@freebsd.org> <49321FF8.6000805@mWare.ca> In-Reply-To: <49321FF8.6000805@mWare.ca> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-DCC--Metrics: ebb.errno.com; whitelist Cc: freebsd-net@freebsd.org Subject: Re: Determining counts or size of routing table? (netstat performance?) X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 30 Nov 2008 05:18:29 -0000 Mykel wrote: > Sam Leffler wrote: > >> Julian Elischer wrote: >> >>> Mykel wrote: >>> >>>> Got a few 6.x machines running OpenBGPd with a few BGP full-feeds and a >>>> handful of peers... I'd like to determine the size of the FIB/kernel >>>> routing table. OpenBGPd does not give me this data, and on my >>>> duallie-Xeon 2.8s, it takes quite a while to use netstat & wc to count. >>>> >>>> I'm not looking for exact numbers, just something I can poll via >>>> NetSNMP >>>> and plot in cacti... >>>> >>>> I looked though netstat, route, sysctl, vmstat, even pored over an >>>> snmpwalk... can't find anything. >>>> Been asking around, and the only suggestion I've received was to >>>> write a >>>> daemon that dumps the table and then monitors the changes, but I'm >>>> not a >>>> programmer, nor could I find any tool in ports that might assist in >>>> this. >>>> >>>> I'd be happy with almost any metric that gives me some absolute >>>> reference as to how big my routing table is so I can get some nice >>>> pretty graphs done up. Not pounding the system every 60-300 seconds >>>> would be very nice. >>>> >>>> Any suggestions? Or does everyone just pipe netstat? Is there a MIB for >>>> sysctl or NetSNMP I'm missing? >>>> >>>> >>> no. It's a hard thing to do so that is why it hasn't been done yet. >>> >> Perhaps I misunderstand his question but >> >> trouble% vmstat -m |grep routetbl >> routetbl 14 2K - 33875 16,32,64,128,256 >> >> should show memory allocated to the routing table. >> > I was also shown (privately) this: > > # vmstat -z | grep "rtentry" > rtentry: 120, 0, 198, 474, > 12190, 0 > > Either works for me, so I'm now happy. Thanks! > Yes, was looking for that but stopped when I found malloc's for the radix tree :-) Sam