BIND 9.x caching Performance under heavy loads

Kelsey Cummings kgc at
Mon Mar 28 18:22:30 UTC 2005

Rick Jones wrote:
> Kelsey Cummings <kgc at> wrote:
>>Any recomendations from the list?
> Try and get a profile from when the CPU is not pegged, and when it is
> pegged.  That means finding a profiling tool for your platform that
> can attach to a running process.  For Itanium that would be one of
> Caliper (Linux or HP-UX) or q-syscollect (Linux).  I'm not sure what
> they would be for other platforms, but would love to learn.

I'll try, new ground for me but I'd really like to nip this one.

> Looking at the data for I see that the ifPackets
> seems to increase over time as well, then drop to nearly nil - when
> the CPU spikes?  It also seems that there is a point where the forks
> spike? Etc etc.

I'm not sure about the drop-to-nil, but the rise it packets was 
legitimate request traffic that was supposed to be directed to another 

> Is there any chance of something, well, nefarious happening here?

It's possible but I think unlikely.


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