BIND memory statistics?

[D. Stussy]

"Kevin Darcy" <kcd at chrysler.com> wrote in message
news:g5j3uk$2ivi$1 at sf1.isc.org...
> Matus UHLAR - fantomas wrote:
> > Hello,
> >
> > I am currently running bind 9.5.0-p1 with cache limit turned off. I
would
> > like to turn it on, however It would be better with knowing how is
memory
> > used after some time (e.g. a week).
> >
> > I know how much of RRs do I have in cache but what are their average
TTL's,
> > were their TTL's when they were received and how often are they used?
> >
> > This should imho help me to know how effective the caching is, so I
could
> > tune memory usage. As I mentioned, my limit is currently turned off, but
> > this could lead to excessive memory consumption of named process.
> >
> > I am also planning to turn on acache, but the problem is similar - I'd
like
> > to have an idea how effective it is...
> >
> > Can anyone advise me, if/how, is possible to do this?
> >
> Well, you can look at the memory consumption of the process, and you can
> use a sniffer to see how much traffic -- when you get cache misses -- is
> going between your nameserver and the authoritative nameservers it's
> querying on behalf of local clients, what else would you measure and,
> once measured, how would you optimize? max-cache-ttl? max-ncache-ttl?
> cleaning-interval? For BIND, usually the solution to memory problems is
> to buy more memory; there's only so much you can twiddle in named.conf
> to try and squeeze more performance from a memory-starved box.

Or you could look at the web page that was added in 9.5.0.