2014-10-13 13:05 GMT-03:00 Ciro Iriarte <[email protected]>: > 2014-10-13 10:37 GMT-03:00 bert hubert <[email protected]>: >> On Mon, Oct 13, 2014 at 10:10:43AM -0300, Ciro Iriarte wrote: >>> 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?. >> >> Yes, on a cold cache, nameservers are a lot slower. >> >> You can improve on this by increasing the number of mthreads (max-mthreads) >> and the number of file descriptors. >> >> The best performance comes from a busy nameserver, as outlined on >> http://blog.netherlabs.nl/test/ >> >> That your second time results were worse is weird, can you do a test with >> more than 1000 domains, say, 50000? >> >> Can you report "rec_control get-all" before and after a run? >> >> Perhaps your PowerDNS server is behind NAT and your other server isn't? >> >> Bert > > Hi Bert!, I've run again 1000 domain test with logging disabled (just > in case). The results look pretty much the same: > http://pastebin.com/Nsjhjnx3 > > Tried a cold cache with 80k domains, it was a disaster, I couldn't let > it finish. > > The configuration: > ---- > local-address=<ip1>,<ip2>,<ip3> > allow-from=<test1>,<test2>,<test3> > threads=10 > --- > > I'll double check with the networking guys, This server will use a > secondary public IP, but I see that the queries get out with the base > private IP, so it's possible that the edge NAT is causing this. > > > I'll keep you updated. Thanks! > > -- > Ciro Iriarte > http://iriarte.it > --
Well, wanted to answer this having the issue solved, but the "ticket is enqueued" with the networking team. So far I could get statistics from the NAT machine, the server was hitting the 2048 ports limit. Running several batches without restarting the server got me 100% hit rate. So, we're moving the server to the outside (public IP) to continue load test. Thanks once more! -- Ciro Iriarte http://iriarte.it -- _______________________________________________ Pdns-users mailing list [email protected] http://mailman.powerdns.com/mailman/listinfo/pdns-users
