The CPU of DNS Server is very high

[Cinense, Mark]

Ana,  This used to happen to me as well, with Bind 8.2.x and 8.3.  What =
I
did was run a script that checks cpu utiliztion every 5 minutes.  When =
the
cpu gets to a certain percentage, the system will email me, and I can =
see
what is causing the cpu to get so high.  Well, I did this and it seems =
that
during the named-xfer run, right after an automated reload and restart =
of
the named daemon, it tops out.  For my situtation, named restarting, =
and
named-xfer running at the same time is what topped out the cpu.  You =
may
want to try the same thing, so that you can see when the cpu tops out =
at,
and go against your logs to see what is happening.  Hope this helps.

M A C
Sandia Labs

-----Original Message-----
From: ap_anjos at yahoo.com [mailto:ap_anjos at yahoo.com]
Sent: Monday, July 29, 2002 10:29 PM
To: comp-protocols-dns-bind at isc.org
Subject: The CPU of DNS Server is very high



Friends,

I am having some problems that I don=B4t know how to treat it.. I have =
2
machines Sun Netra T1 (cpu 400Mhz) and Sun Netra T1125 (cpu 440 Mhz)
with Solaris 8, 1024Mb RAM and Bind 8.2.4 installed.

Lately, the CPU=B4s of these machines are keeping about 98% of
occupation to the named process and, sometimes, the server doesn=B4t =
get
answer the requests because there is no CPU.
During the dawn, for example, the named process occupied about 30% of
the CPU, and now it is about 95%.
I=B4ve already done a "snoop" to look for something different and I =
just
found some "domains" that don=B4t answer, but I believe that this cases
don=B4t do this kind of problem. I took a look at the logs messages, =
but
there is nothing strange.

I don=B4t know what do and any hint will be very, very welcome.

Thanks a lot..

Ana Paula