Hi,
On 4/6/21 8:35 AM, Otto Moerbeek via Pdns-users wrote:
On Mon, Apr 05, 2021 at 05:30:11PM +0000, Nejedlo, Mark via Pdns-users wrote:
Some thoughts:
2 distributior thread feels a bit overkill, 1 distributor thread
should be able to feed 8 workers. Did you do measurements to come to
this value?
Your maintenance function looks like it could run for a while if
timeouts happen. I don't know how bad that would be from the top of
my head, but it could have an impact.
Your packet cache hit ratio is extremenly low. Are you running dnsdist
with a packetcache in front of this recursor? Or can you explain it
from the type of queries you are getting?
I see that XPF is enabled between dnsdist and the recursor, which likely
kills the recursor's packet cache. That might explain the bad
performance results.
Would you mind sharing your dnsdist configuration as well?
If you are setting up a lab env, I certainly would try to use 4.4 or
4.5 (which is in beta) they both contain performance improvememnts.
And then using the proxy protocol instead of XPF could be a huge
improvement.
Best regards,
--
Remi Gacogne
PowerDNS.COM BV - https://www.powerdns.com/
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