clients-per-query
Mark Andrews
Mark_Andrews at isc.org
Fri Nov 9 20:31:00 UTC 2007
> 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 at isc.org
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