Strange recursor response time pattern

[Havard Eidnes]

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...

Best regards,

- Håvard