Hello Bert, We are running PowerDNS 4.1.3 and have tested against MySQL 5.1.73 en PostgreSQL 10.4. It runs on CentOS 6.9, tested with both kernel versions `2.6.32-696.20.1.el6.x86_64` and `4.15.13-x86_64-linode106`.
Running bench-db for all domains reports: 1.32192 millisecond/lookup Retrieved 31554 records, did 10000 queries which should have no match Packet cache reports: 0 hits (should be 0) and 0 misses In the output of dnsgram are many lines like this, especially during the performance drops: 2018-07-05 16:12:12: Auth server dropped too many questions (683 vs 151), diff: 532 I could put the output files somewhere online if needed. dnsscope produces the following output: PCAP contained 948599 correct packets, 10 runts, 0 oversize, 0 non-UDP. Timespan: 0.310556 hours 0 non-DNS UDP, 0 dns decoding errors, 2 bogus packets Ignored fragment packets: 0 Dropped DNS packets based on recursion-desired filter: 0 DNS IPv4: 761357 packets, IPv6: 187242 packets Questions: 518087, answers: 430510 492392 (95.04% of all) queries did not request recursion 21131 answers had recursion desired bit set, but recursion available=0 (for 92 remotes) 87277 queries went unanswered, of which 128 were answered on exact retransmit 71 responses could not be matched to questions 439883 questions requested EDNS processing, do=1: 412804, ad=1: 9, cd=1: 319760 Rcode Count No Error 318934 (74.1%) Server Failure 422 (0.1%) Non-Existent domain 14897 (3.5%) Query Refused 96257 (22.4%) 0.19% of questions answered within 50 usec (0.19%) 23.38% of questions answered within 100 usec (23.19%) 42.11% of questions answered within 200 usec (18.73%) 48.09% of questions answered within 300 usec (5.98%) 51.58% of questions answered within 400 usec (3.49%) 57.36% of questions answered within 800 usec (5.78%) 59.76% of questions answered within 1000 usec (2.41%) 70.02% of questions answered within 2.00 msec (10.26%) 85.34% of questions answered within 4.00 msec (15.31%) 95.91% of questions answered within 8.00 msec (10.57%) 99.43% of questions answered within 32.00 msec (3.52%) 99.52% of questions answered within 64.00 msec (0.09%) 99.65% of questions answered within 256.00 msec (0.12%) 99.86% of questions answered within 1024.00 msec (0.21%) 127 responses (0.03%) older than 2 seconds Average non-late response time: 4702.69 usec Saw questions from 29140 distinct remotes, answers to 1 Saw 29139 unique remotes asking questions, but not getting RA answers On 24/07/2018 13:58, bert hubert wrote: > On Tue, Jul 24, 2018 at 01:54:53PM +0200, Martijn Reening wrote: >> We have run out of ideas where to look and what to tune. Perhaps anyone >> here could help us further? > > could you tell us what database you run, what version of PowerDNS, what the > output is of 'pdnsutil bench-db', what operating system? Thanks. > > Also, can you start running a tcpdump and feeding it through dnsscope and > dnsgram? > > Also some sample domain names we can query would be nice, maybe we can see a > pattern. > > Thanks. > > > Bert > _______________________________________________ > Pdns-users mailing list > Pdns-users@mailman.powerdns.com > https://mailman.powerdns.com/mailman/listinfo/pdns-users > -- Regards, Martijn Reening _______________________________________________ Pdns-users mailing list Pdns-users@mailman.powerdns.com https://mailman.powerdns.com/mailman/listinfo/pdns-users
