Named high CPU usage (was: MX Record Configuration)
Andy Shellam (Mailing Lists)
andy.shellam-lists at mailnetwork.co.uk
Tue Oct 31 23:21:39 UTC 2006
Please don't hijack another thread - start your own if the subject is
As to your problem, do you have any further information about your setup
- OS, Bind version/patch level etc? The number of domains you're hosting?
You can also check the stats (rndc stats) to see how many queries your
Bind has done since it was last restarted - in my own implementation,
Bind is restarted every day, and the stats recorded just before-hand, so
I can immediately spot a problem - a while back, our network proxy
server was hijacked, and the number of queries on Bind jumped from 100k
a day to 2 million.
Edson Alvarenga J. wrote:
> I had a problem whit my mail server, the problem was in my DNS Server,
> the named was 97% CPU, then resolved some domains, I want Know, Why the
> named arrived to 97%, i check my logs and don´t had Intrusion.
> Somebody helpme.
> Best Regards,
> Barry Finkel escribió:
>> Kevin Darcy replied to a posting:
>>> There's nothing magical about the first label of the name, in SMTP
>>> terms. The only thing that really matters in terms of SMTP failover is
>>> the preference value. If your box -- whatever it's called -- has a
>>> preference of 5 and your ISP's box -- whatever it's called -- has a
>>> preference of 10, then mail will be delivered to your box, if possible,
>>> and only if it is not possible will sending MTAs fail over to your ISP's
>> When I last looked at spam statistics on our backup mail relay box,
>> I found that 25% of the mail to that box was legitimate mail, and
>> 75% was spam. I know that our primary mail relay box was not
>> unavailable 25% of the time, so there are mailers on the Internet
>> that do not follow the rules in the MX RFC. I did not have time to
>> look at some of the mail to try to determine what mail software
>> delivered the mail to the higher preference MX host.
>> Barry S. Finkel
>> Computing and Information Systems Division
>> Argonne National Laboratory Phone: +1 (630) 252-7277
>> 9700 South Cass Avenue Facsimile:+1 (630) 252-4601
>> Building 222, Room D209 Internet: BSFinkel at anl.gov
>> Argonne, IL 60439-4828 IBMMAIL: I1004994
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