server sizing

[Yoko Ishizuki]

I'm estimating a server size for a DNS server.  I need to determine its
CPU, memory, and disk size.  I have searched for the web for information
concerning this, especially for memory size needed and sessions BIND
accepts at a time, but I couldn't.  I heard that BIND goes on increasing
its memory use until restarted.  I expect our DNS server will be
accessed quite often.

Could anyone tell me how you have estimated your DNS server hardware?

--
Yoko Ishizuki