[Pdns-users] High CPU load with no traffic

Ciro Iriarte cyruspy at gmail.com
Tue Dec 16 00:54:14 UTC 2014

2014-12-15 13:21 GMT-03:00 bert hubert <bert.hubert at netherlabs.nl>:
> On Mon, Dec 15, 2014 at 01:14:41PM -0300, Ciro Iriarte wrote:
>> Hi!, I'm deplaying some recursors with 3.6.2 (packaged by EPEL) and
>> they randomly use a lot of CPU and the queries dy by timeout. I've
>> seen loads from 1 to 5 (100% and 500% CPU usage).
> Hi Ciro. We've not heard of anything like this.
> Could you set a server that does this to report to our Metronome setup as
> described in
> http://blog.powerdns.com/2014/12/11/powerdns-graphing-as-a-service/ ?
> Does your Lua script do anything exciting?
> Threads=16 is a higher number than we usually recommend, but this should of
> course not matter. But perhaps the problem goes away if you lower the
> number, and this would be good to know.
> Thanks for your report!
>         Bert

Hi!, found the culprint with Bert's help. It was and unhandled
situation that caused a loop in the Lua script. For anyone interested,
I posted an updated version of the script here:



Ciro Iriarte

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