Hello Tony, On Thu, Mar 31, 2016 at 05:08:43PM +0100, Tony Finch wrote: > Michael Brunnbauer <bru...@netestate.de> wrote: > > > > I am using bind on a server that does massive crawling with a multithreaded > > Java app. This server occasionally has to do lookups for hosts in our local > > zone netestate.de - for which it is not authoritative - and those lookups > > tend > > to fail when the load is high (e.g. >1000 recursing clients). This suggests > > some kind of congestion. > > Have you tried adjusting the clients-per-query and max-clients-per-query > options?
I just tried
clients-per-query 250;
max-clients-per-query 1000;
and it did not help. I noticed a drop in the number of recursing clients and
the number of queries/s when a lookup failed for the local zone but named
logged no special messages in the syslog.
Is is possible that is this connected to rndc stats? I will stop doing
rndc stats for a while to test (it currently runs every minute).
BTW: I also excluded packet loss as cause of the problem.
Regards,
Michael Brunnbauer
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