Reducing memory usage by using db storage - performance?

[MURTARI, JOHN]

Folks,
                Recently been looking at servers that host almost 200K ARPA zones and load  about 80 million resource records.  They run on good hardware and take only a few minutes to load the zones on a clean start.   The issue is memory utilization of about 23 Gig in RAM.
                It seems a terrible waste of memory and a good portion of those zones probably rarely see queries.

                I've got extensive experience with mySQL and postgres, but always assumed you'd really take a latency hit.  Plus, we'd be adding more complexity by running a DB server.  The current DNS servers are located in separate data centers - it seems we'd have to also run a master/slave DB setup, with a slave DB server at each site to avoid network overhead.  This all sounds very slow and more complicated.

                Anyone with experience solving this type of issue?
                Many thanks!
John

----------------
John Murtari - jm5903 at att.com<mailto:jm5903 at att.com>
Ciberspring
office: 315-944-0998
cell: 315-430-2702

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