bind-9.3.2 / CPU issue.

[tsar.peter at gmail.com]

Wesley Hof wrote:
> Hi list,
>
> I currently run bind version 9.3.2 on a machine :
>
> Mem:   3108468k total
> Swap:  2097136k total
> Cpu:   dual Intel(R) Xeon(TM) CPU 2.80GHz
>
> I have four of these boxes running as caching nameservers for my customers. I get about 600 queries/second on each machine. After x amount of time my cpu usage peeks to 100%
> resulting in _real_ slow responses, the problem doesn't go away from itself, I need to restart named to get this fixed. All four machines have this issue. I tried several upgrades,
> tuning config options like max-cache-size, max-ncache-ttl ... still no result. I do use an ACL to restrict users based on ip, tried to disable that to for a while, but still with no result.
>
> Is there someone with the same issue ? Or some good tips ? :)
>
> Thanks,
> Wesley.
>
> --
> (o_  Wesley Hof
> //\  UNIX System Engineer
> V_/_ Scarlet Belgium

What OS and what version do you use ? What NIC is used ?
What does netstat -i and netstat -a shows ?