[nsd-users] nsd 3.2.7-1 statistics signalling

Matthijs Mekking matthijs at nlnetlabs.nl
Mon Apr 16 12:59:00 UTC 2012

Hash: SHA1


On 02/13/2012 01:48 PM, Matthijs Mekking wrote:
> Hi,
> On 02/10/2012 03:42 PM, Mathias Wolkert wrote:
>> Hi
>> On 2/9/12 14:04 , Matthijs Mekking wrote:
>>> Hi,
>>> I have got two pointers for you:
>>> NSD will only output stats if there is anything to report, so
>>> if all stats are zero, no stats will be logged.
>> Ouch, that's one way to do it... I'll add it to my list of
>> oddities in nsd.
>> It seems like stats are reset by an update of the zone, is that 
>> expected also? What else resets the statistics, SIGUSR1?
> I am seeing that behavior too (at zone updates), but I didn't
> expect it. I'll look into it. Signals does not reset the statistics
> for me.

The stats are per child server. A reload triggers new children, so a
reload resets the stats.

Best regards,

>>> To increase logging, set the verbosity to a high number in 
>>> nsd.conf.
>> Is there anything higher than 2?
> Computer says no: grep -r VERBOSITY *.c
> Best regards, Matthijs
>>> Or build NSD with --enable-checking to get debug statements 
>>> (note that this will slow down the server).
>>> Best regards, Matthijs
>> /Tias
>>> On 02/09/2012 11:00 AM, Mathias Wolkert wrote:
>>>> Hi
>>>> I have two identical servers running stock debian lenny with
>>>>  kernel 2.6.32-bpo.3-amd64 and nsd 3.2.7-1.
>>>> They are both hosting just one zone but the zones are 
>>>> different. One is big (+10M records) and the other bigger
>>>> (+35M records).
>>>> Sending the USR1 signal to dump statistics works fine with
>>>> the smaller server but nothing happens when sending it to
>>>> the bigger server.
>>>> I tried running the smaller zone on the "bad" server but it 
>>>> still does not respond to my SIGUSR1.
>>>> Both are configured to generate statistics every 300s but
>>>> that also fails for the bigger server, it only generate
>>>> XSTATS when zone is updated and after nsec3-prepare.
>>>> Either I'm failing to run it in debug mode or nsd is very 
>>>> silent, coz it gives me nothing.
>>>> Any help is much appreciated.
>>>> /Tias _______________________________________________
>>>> nsd-users mailing list nsd-users at NLnetLabs.nl 
>>>> http://open.nlnetlabs.nl/mailman/listinfo/nsd-users
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