bind-9.3.2 / CPU issue.

[Wesley Hof]

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