[Pdns-users] New recursor install, 50% timeout on first run

[Ciro Iriarte]

Hi!, I'm running some quick tests on a new Recursor (3.6.1) and I see
~ 50% query timeouts. It has a good Internet connection but no clients
yet, can this be caused by empty cache?.

It's pretty much default configuration, tried to push threads from 2
to 10, but it still gives me a lot of queries unanswered. The bind
server it should replace gives me nearly 100% of answers, but it's
being heavily queried.

[root at dummy01 ~]# dnsbulktest -q <newpdns> 53 1000 < /tmp/top-1m.csv
Read 1000 domains!
Sending                                 Receiving
  Queued                       1000       Received                      999
  Error -/-                       0       Timeouts                      431
                                          Unexpected                    430
 Sent                          1000      Total                         1860

DNS Status
  OK                            554
  Error                           3
  No Data                         6
  NXDOMAIN                        6
  Unknowns                        0
Answers                         569
  Timeouts                      431
Total                          1000

Mean response time: 781.755 msec, median: 559.377 msec
Time <  0.612 msec             0.100% cumulative
Time < 11.853 msec             1.000% cumulative
Time < 90.583 msec             2.500% cumulative
Time < 179.855 msec           10.000% cumulative
Time < 286.560 msec           25.000% cumulative
Time < 529.308 msec           50.000% cumulative
Time < 944.519 msec           75.000% cumulative
Time < 1764.946 msec          90.000% cumulative
Time < 3243.277 msec          97.500% cumulative
Time < 4190.023 msec          99.000% cumulative
Time < 4420.831 msec          99.990% cumulative

It gave me worse times on the second run:

[root at dummy01 ~]# dnsbulktest -q <newpdns> 53 1000 < /tmp/top-1m.csv
Read 1000 domains!
Sending                                 Receiving
  Queued                       1000       Received                      921
  Error -/-                       0       Timeouts                      616
                                          Unexpected                    537
 Sent                          1000      Total                         2074

DNS Status
  OK                            356
  Error                          22
  No Data                         2
  NXDOMAIN                        4
  Unknowns                        0
Answers                         384
  Timeouts                      616
Total                          1000

Mean response time: 821.931 msec, median: 475.079 msec
Time <  0.215 msec             0.100% cumulative
Time <  0.218 msec             1.000% cumulative
Time <  0.233 msec             2.500% cumulative
Time <  0.509 msec            10.000% cumulative
Time < 186.245 msec           25.000% cumulative
Time < 472.501 msec           50.000% cumulative
Time < 796.832 msec           75.000% cumulative
Time < 2447.657 msec          90.000% cumulative
Time < 3827.301 msec          97.500% cumulative
Time < 4207.631 msec          99.000% cumulative
Time < 4699.756 msec          99.990% cumulative

Comments?


Regards,

-- 
Ciro Iriarte
http://iriarte.it
--