[Pdns-users] Real Stats

Stefan Schmidt s.schmidt--pdns at mcbone.net
Fri Dec 1 10:49:50 UTC 2006

On Thu, Nov 30, 2006 at 10:31:47PM -0800, Max Clark wrote:
> Thanks Bert!

Indeed, thanks Bert!

> Uptime: 1.51 days Queries/second, 1, 5, 10 minute averages: 1.19e+03,
> 929, 682. Max queries/second: 4.55e+03
> Cache hitrate, 1, 5, 10 minute averages: 3.9%, 3.7%, 3.3%
> Backend query cache hitrate, 1, 5, 10 minute averages: 74%, 74%, 74%
> Backend query load, 1, 5, 10 minute averages: 1.91e+03, 1.45e+03,
> 1.01e+03. Max queries/second: 2.63e+03
> Total queries: 23841475. Question/answer latency: 0.008ms

Yes, nice stats, especially the latency off course, from what i have
seen pdns answers queries faster than bind.
Btw: If you run a recursive/caching-only nameserver you don't really
need to put the pdns_daemon in front of the recursor as it doesn't
really make a difference in the time thats needed to access its cache.
So you can just try and make the recursor listen to your 'outside'
IP-Address instead of just

I have 10 pdns_recursor processes that are up and running since 3.1.4
came out on November 13th and as far as i know there is not one report
of single crashed 3.1.4 recursor so far, so its pretty much the 'gold
edition' for me.
I have those 10 processes on 5 machines running behind a redundant
loadbalancer setup and just last Sunday i had a sustained peak usage
of 9950 queries/second.

The recursor also gives some nice statistics print, here is one process:
stats: 1078297759 questions, 1995041 cache entries, 16818 negative entries, 77% cache hits
stats: throttle map: 5060, ns speeds: 13533
stats: outpacket/query ratio 33%, 10% throttled, 0 no-delegation drops
stats: 49371 outgoing tcp connections, 36 queries running, 21638732 outgoing timeouts

ok enough bragging ;)

DeVries' Dilemma: If you hit two keys on the typewriter, the one you don't want
                  hits the paper.

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