[Pdns-users] troubleshooting dnsdist -> recursor instability
cm at appliedprivacy.net
Mon Oct 24 12:05:59 UTC 2022
> Clearly unexpected. You might be able to get more information about what
> is going by setting setVerboseHealthChecks  in dnsdist.
very good point, thank you I'll enable it!
> One unrelated thing I noticed in your configuration is that you are
> setting maxInFlight to 1000 on newServer, telling dnsdist to send up to
> 1000 concurrent queries on an outgoing TCP connection to the backend,
> but on the recursor's side it looks like
> max-concurrent-requests-per-tcp-connection  is set to the default of
> 10. This might lead to terrible latency numbers over TCP, so I would
> suggest increasing that setting, or decreasing the maxInFlight value in
> the dnsdist configuration.
I'll enable max-concurrent-requests-per-tcp-connection to 1000 on
thanks for taking a look the config files and your valuable input!
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