Re: Strange recursor response time pattern

2017-09-07 Thread Havard Eidnes
> It would be difficult, and possibly impossible, to continue to > process queries and format a report on queries simultaneously > without losing information in the report. To have a separate > thread creating the report, it might have to stop query > processing, take a snapshot of the data at

RE: Strange recursor response time pattern

2017-09-07 Thread Charles Elliott
-Original Message- From: bind-users [mailto:bind-users-boun...@lists.isc.org] On Behalf Of Havard Eidnes Sent: Wednesday, September 6, 2017 8:40 AM To: m...@conundrum.com Cc: bind-us...@isc.org Subject: Re: Strange recursor response time pattern >> Is that pulling the old-style stat

Re: Strange recursor response time pattern

2017-09-06 Thread Havard Eidnes
>> Is that pulling the old-style stats file, or the HTTP-based stats channel? As should be evident from my other message, this is using the HTTP-based stats channel. > If the latter... the zone list (and by extension the root > document) seems to take a long time to process, and involves > some

Re: Strange recursor response time pattern

2017-09-06 Thread Havard Eidnes
>> The stats channel output relating to running tasks and memory contexts >> is very extensive. > > Either way I would not have expected use of the statistics > channel to negatively impact the query performance. Is the query > channel processed with "no-delay", so that a thread doesn't get >

Re: Strange recursor response time pattern

2017-09-05 Thread Havard Eidnes
>> some further local discussion has made me aware that us running >> "collectd" for monitoring BIND may be contributing to the >> problem; collectd fetches data each 10s by using the BIND- >> configured statistics-channel, thus BIND is processing a TCP >> connection to deliver the statistics

Re: Strange recursor response time pattern

2017-09-05 Thread Matthew Pounsett
On 5 September 2017 at 11:56, Havard Eidnes wrote: > Hmm... > > some further local discussion has made me aware that us running > "collectd" for monitoring BIND may be contributing to the > problem; collectd fetches data each 10s by using the BIND- > configured

Re: Strange recursor response time pattern

2017-09-05 Thread Ray Bellis
On 05/09/2017 16:56, Havard Eidnes wrote: > Hmm... > > some further local discussion has made me aware that us running > "collectd" for monitoring BIND may be contributing to the > problem; collectd fetches data each 10s by using the BIND- > configured statistics-channel, thus BIND is processing

Re: Strange recursor response time pattern

2017-09-05 Thread Havard Eidnes
Hmm... some further local discussion has made me aware that us running "collectd" for monitoring BIND may be contributing to the problem; collectd fetches data each 10s by using the BIND- configured statistics-channel, thus BIND is processing a TCP connection to deliver the statistics data. It's

Re: Strange recursor response time pattern

2017-09-05 Thread Matus UHLAR - fantomas
On 05.09.17 16:44, Havard Eidnes wrote: It seems that every 10s, "on the clock", BIND will temporarily increase the query response time rather drastically for a short while, only to settle down to normal behaviour until the next 10s event. Any idea what might be causing this? Anything I can