[Pdns-users] Recursor: Default/blind tunning?

Ciro Iriarte cyruspy at gmail.com
Thu Oct 16 13:13:58 UTC 2014

Hi!, I'm awaiting for some network-side changes to continue my load
tests, but would like to know in the meanwhile if there are some rule
of thumbs to setup a Linux recursor. The parameters that fit the
description apparently are "pdns-distributes-queries", "max-mthreads"
and "threads".

I understand that the recursor uses only 2 threads by default, should
I increase that to the number of cores available, maybe even
oversubscribe?, what's the relation between "max-mthreads" and

If I force ANY requests to TCP (any-to-tcp=yes), how much should I
increase "max-tcp-clients", can I set is as "unlimited"?.

I'll appreciate any comments on this topics.


Ciro Iriarte

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