Reducing memory usage by using db storage - performance?

McDonald, Daniel (Dan) Dan.McDonald at
Thu Mar 24 12:34:25 UTC 2016

> On Mar 24, 2016, at 6:28 AM, MURTARI, JOHN <jm5903 at> wrote:
> 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.

But RAM is cheap.  a 32GB stick is usually under $200. And 80 million customers?  Seems like a very small price to pay for reliable PTR records.

>                 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.

And the development of such a system would cost significantly more than throwing a couple more sticks of RAM into your server, and have on-going training and maintenance costs.  Yes, engineers like to create an elegant solution, but sometimes the cheap solution just makes a lot of sense.

>                 Anyone with experience solving this type of issue?
>                 Many thanks!
> John
> ----------------
> John Murtari – jm5903 at <mailto:jm5903 at>
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