On Mon, 18 Apr 2011, Dennis Perisa wrote:
Hi all,
Is there a rule of thumb when setting max-cache-size? e.g. max physical
memory * 0.4
Is there even a need to set max-cache-size on a server with plenty of memory
(>10GB) running only BIND?
Regards
Dennis
Dennis, since getting the answers from cache is usually faster (and
therefore more efficient) than recursing, I think the question is really
what is the definition of "plenty of memory". If bind's performance is
hindered because of available memory then a limit on the cache size may be
warranted, as also an increase of memory may be. In the example, a
max-cache-size of .4*10GB leaves a residual pool that far exceeds BIND's
requirements. The answer must be determined empirically; If performance
is adversely affected then (and only then) limit the cache size .
Dave
--
David Forrest
Maple Park Development Corporation
St. Louis, Missouri
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