Debuging BIND 8.3.3

Fri Sep 20 02:31:34 UTC 2002

> 
> Hi all,
> 
> I=B4m having trouble with my public dns's so I've turned debuging on, but
> there are some messages I can't understand well.
> 
> The problem is that during the day servers are OK, but at the peak point
> (here in Spain it's about 6 p.m) named gets about 80/90 % CPU usage.
> 
> These are the main messages I don't understand well, I think it's a
> comunications problem so dns's get lots of forward queries, I don't
> think it could be a named problem, and neither i see on the messages.
> 
> Thanks in advance.

	The nameservers for the zone have ridiculously small TTLs
	(30, 120 seconds ) as a result your server has to keep on
	going out and fetching the records.  On top of that each
	nameserver is in its own zone which also results in additional
	traffic.

	Mark
> 
> PS: Machines are one SUN Ultra 2, and two Netras T1
> 
> Block 1
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D14567 id=3D2 76=
> 83ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D24614 id=3D3591=
>  7683ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D18564 id=3D6482=
> 1 7683ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D55934 id=3D101 =
> 7683ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D43586 id=3D0 76=
> 83ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D2377 id=3D0 768=
> 3ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D19818 id=3D1 76=
> 83ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D3451 id=3D2 768=
> 3ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D59194 id=3D2 76=
> 83ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D8814 id=3D25 76=
> 83ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D54509 id=3D4543=
>  7683ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D56852 id=3D1 76=
> 83ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D46386 id=3D4466=
>  7683ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D15504 id=3D4 76=
> 83ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D59568 id=3D2500=
>  7683ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D60740 id=3D0 76=
> 83ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D4960 id=3D0 768=
> 3ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D24671 id=3D3 76=
> 83ms
> reforw(addr=3D0 n=3D1) -> [172.27.192.131].53 ds=3D4 nsid=3D20514 id=3D3819=
>  7683ms
> 
> End Block 1
> 
> Block 2
> 
> datagram from [172.27.192.131].53, fd 4, len 235
> resp: nlookup(rateyourmusic.com) qtype=3D1
> resp: found 'rateyourmusic.com' as 'rateyourmusic.com' (cname=3D0)
> finddata(): buflen=3D4061
> sysquery: send -> [172.27.192.131].53 dfd=3D4 nsid=3D54357 id=3D0 retry=3D1=
> 032454305
> sysquery: send -> [172.27.192.131].53 dfd=3D4 nsid=3D4112 id=3D0 retry=3D10=
> 32454305
> sysquery: send -> [172.27.192.131].53 dfd=3D4 nsid=3D62827 id=3D0 retry=3D1=
> 032454305
> sysquery: send -> [172.27.192.131].53 dfd=3D4 nsid=3D39918 id=3D0 retry=3D1=
> 032454305
> sysquery: send -> [172.27.192.131].53 dfd=3D4 nsid=3D11405 id=3D0 retry=3D1=
> 032454305
> sysquery: send -> [172.27.192.131].53 dfd=3D4 nsid=3D33873 id=3D0 retry=3D1=
> 032454305
> sysquery: send -> [172.27.192.131].53 dfd=3D4 nsid=3D64282 id=3D0 retry=3D1=
> 032454305
> sysquery: send -> [172.27.192.131].53 dfd=3D4 nsid=3D35901 id=3D0 retry=3D1=
> 032454305
> sysquery: send -> [172.27.192.131].53 dfd=3D4 nsid=3D37675 id=3D0 retry=3D1=
> 032454305
> sysquery: send -> [172.27.192.131].53 dfd=3D4 nsid=3D5595 id=3D0 retry=3D10=
> 32454305
> 
> End Block 2
> 
> Block 3
> 
> datagram from [172.27.192.131].53, fd 4, len 154
> DUP? dropped (id 29371)
> 
> datagram from [172.27.192.131].53, fd 4, len 53
> send_msg -> [193.153.205.209].1486 (UDP 28) id=3D1
> datagram from [172.27.192.131].53, fd 4, len 36
> DUP? dropped (id 57721)
> datagram from [172.27.192.131].53, fd 4, len 46
> DUP? dropped (id 56216)
> datagram from [172.27.192.131].53, fd 4, len 47
> DUP? dropped (id 21491)
> datagram from [172.27.192.131].53, fd 4, len 42
> DUP? dropped (id 33418)
> datagram from [172.27.192.131].53, fd 4, len 63
> DUP? dropped (id 47386)
> datagram from [172.27.192.131].53, fd 4, len 49
> DUP? dropped (id 8578)
> datagram from [172.27.192.131].53, fd 4, len 47
> retry(0x6498b88): expired @ 1032454249 (40 secs before now (1032454289))
> send_msg -> [213.96.232.87].61977 (UDP 28) id=3D4660
> datagram from [172.27.192.131].53, fd 4, len 35
> DUP? dropped (id 17227)
> 
> End Block 3
> 
> --
> --------------------------------------------------
> Joaquin J. Domens
> =C1rea de Tecnolog=EDa
> Departamento de Producci=F3n / Aplicaciones
> --------------------------------------------------
> Terra Networks Espa=F1a S.A.
> Juli=E1n Camarillo, 6
> 28037 Madrid, Espa=F1a
> --------------------------------------------------
> Mercado Continuo: TRR |  Nasdaq: TRLY
> --------------------------------------------------
> http://www.terra.es
> --------------------------------------------------
> 
> 
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org