On Fri, Feb 18, 2005 at 03:32:47PM -0600, Adam wrote:
> A friend of mine has an interesting situation. Their DNS server gets 
> around 2 to 3 million dns queries a day its running on a quad xeon 
> system with 4 gigs of ram. Its running Bind 9.2.2.

/me jaw drops.  IMHO, that's a beefy machine for DNS.  Perhaps several
smaller machines would be in order.  Is this the only machine doing DNS
on site?  Is it an authorative server?

> At least twice a week if not more their server will stop looking up 
> domains that are not cached.
> They end up having to restart bind to get things working again.
> 
> Any ideas?

Try out dnscache from djbdns. :)  http://cr.yp.to/djbdns.html

Nate