Date: Sat, 29 Nov 2008 21:18:28 -0800 From: Sam Leffler <sam@freebsd.org> To: Mykel <Mykel@mWare.ca> Cc: freebsd-net@freebsd.org Subject: Re: Determining counts or size of routing table? (netstat performance?) Message-ID: <49322224.8010806@freebsd.org> In-Reply-To: <49321FF8.6000805@mWare.ca> References: <4931A5B6.1060000@mWare.ca> <49321494.90706@elischer.org> <49321EE2.6020001@freebsd.org> <49321FF8.6000805@mWare.ca>
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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
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