Strange recursor response time pattern

Ray Bellis ray at
Tue Sep 5 16:35:42 UTC 2017

On 05/09/2017 16:56, Havard Eidnes wrote:
> Hmm...
> some further local discussion has made me aware that us running
> "collectd" for monitoring BIND may be contributing to the
> problem; collectd fetches data each 10s by using the BIND-
> configured statistics-channel, thus BIND is processing a TCP
> connection to deliver the statistics data.
> It's still somewhat surprising and disappointing that this should
> interfere this much with DNS query processing...

There are various URLs (see the BIND 9 ARM) that provide a subset of the
full statistics.

The stats channel output relating to running tasks and memory contexts
is very extensive.

If collectd doesn't need the full set, you may be able to ask for just
the traffic-volume related subset(s).


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