[tor-relays] DNS Timeouts - I think the threshold for overload needs raising

[AMuse]

Hi all!

I'm operating a TOR Exit on dedicated hardware. The load average is low
(0.07) and the network load is fine (120Mb/sec out of a 1Gb/sec link).
Connections aren't being dropped, and for all I can see things are fine.

However, on the TOR Metrics relay search, my exit consistently shows as
"Overloaded" due to DNS failures.

>From my logs, I never go above 2% in DNS failures and from the debugging
I've done so far it looks like most of the failures are in IPv6 lookups not
returning an AAAA record because the destination site has no AAAA
configured.

Could whoever runs the "Overloaded" flag consider upping the overload limit
to 2% or so?  Or, can we tune out ipv6 and ipv4 failures separately maybe?

This was never an issue until I configured my relay for v6.



===========

Jan 15 19:57:45.000 [notice] General overload -> DNS timeouts (65) fraction
1.0619% is above threshold of 1.0000%
Jan 15 20:07:45.000 [notice] General overload -> DNS timeouts (67) fraction
1.0124% is above threshold of 1.0000%
Jan 15 20:17:45.000 [notice] General overload -> DNS timeouts (71) fraction
1.1275% is above threshold of 1.0000%
Jan 15 20:27:45.000 [notice] General overload -> DNS timeouts (94) fraction
1.4003% is above threshold of 1.0000%
Jan 15 20:37:45.000 [notice] General overload -> DNS timeouts (72) fraction
1.2000% is above threshold of 1.0000%
Jan 15 20:47:45.000 [notice] General overload -> DNS timeouts (75) fraction
1.2517% is above threshold of 1.0000%
Jan 15 20:57:45.000 [notice] General overload -> DNS timeouts (70) fraction
1.1605% is above threshold of 1.0000%
Jan 15 21:07:45.000 [notice] General overload -> DNS timeouts (92) fraction
1.6028% is above threshold of 1.0000%
Jan 15 21:17:45.000 [notice] General overload -> DNS timeouts (73) fraction
1.3290% is above threshold of 1.0000%
Jan 15 21:27:45.000 [notice] General overload -> DNS timeouts (73) fraction
1.2907% is above threshold of 1.0000%
Jan 15 21:37:45.000 [notice] General overload -> DNS timeouts (65) fraction
1.0095% is above threshold of 1.0000%
Jan 15 21:47:45.000 [notice] General overload -> DNS timeouts (83) fraction
1.2635% is above threshold of 1.0000%
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