> I've read what's in the ARM about clients-per-query, and think I
> understand.
> My daily LogWatch digests are showing me the following.
>
> clients-per-query decreased to 10: 2 Time(s)
> clients-per-query decreased to 11: 2 Time(s)
> clients-per-query decreased to 12: 2 Time(s)
> clients-per-query decreased to 13: 2 Time(s)
> clients-per-query decreased to 14: 2 Time(s)
> clients-per-query increased to 11: 2 Time(s)
>
> I'm interpreting this as indicating some fluctuations about a "DC level"
> of about 12. I wonder whether quite such dynamic tuning is useful and
> whether some more damping or hysteresis in the feedback loop would be
> harmful.


There is hysteresis in the loop. There's also a 20 minute
timer between reductions which means something is being
logged twice. You can also set this in named.conf.

> /Niall

--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@isc.org