BIND 9.x caching Performance under heavy loads

[Kelsey Cummings]

Rick Jones wrote:
> Kelsey Cummings <kgc at sonic.net> 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 c.ns.sr.sonic.net 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 
server.

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

It's possible but I think unlikely.

-K