<html><head></head><body><div style="color:black;font-size:14px">Hello Alan.<br></div><div style="color: black;font-size: 14px;">Thanks for your answer.<br></div><div style="color: black;font-size: 14px;">In attachment the pdns.conf and the file with the random input domains.<br></div><div style="color: black;font-size: 14px;">Thanks for your help.<br></div><div style="color: black;font-size: 14px;">Riccardo<br></div><div style="color:black;font-size:14px" class="signature"><br></div><div><br></div><div>30/03/2023, 10:54 Alan Holmes ha scritto:<br></div><blockquote style="border-left: 2px solid #a8a8a8;margin-left: 0px;padding-left: 10px;margin-top: 0.5rem;"><div>Hello,<br></div><div> Very interesting issue indeed. I came across a similar problem in the past.<br></div><div> In order for me to understand what you are missing, can you share the configuration you have used and the target IP.<br></div><div> If you will also share some of the random third level domains,<br></div><div> I will also verify your pdns configuration directly.<br></div><div> <br></div><div> Best,<br></div><div> Alan<br></div><div> <br></div><div> <br></div><div> <br></div><div> ------ Messaggio originale ------<br></div><div> Da "Riccardo Brunetti via Pdns-users" <<a href="mailto:pdns-users@mailman.powerdns.com">pdns-users@mailman.powerdns.com</a>><br></div><div> A "pdns-users" <<a href="mailto:pdns-users@mailman.powerdns.com">pdns-users@mailman.powerdns.com</a>><br></div><div> Data 29/03/2023 18:03:45<br></div><div> Oggetto [Pdns-users] PowerDNS tcp query rate<br></div><div> <br></div><div> >Hello.<br></div><div> >We are testing a powerdns authoritative server installation and we are >trying to figure out the maximum query rate in TCP mode.<br></div><div> ><br></div><div> >We use the "dnsperf" tool with the following syntax:<br></div><div> ><br></div><div> >>dnsperf -m tcp -s <a href="http://xxx.xxx.xxx.xxx">xxx.xxx.xxx.xxx</a> -d barbeuk.elenco -c 10 -T 200 -l >>180 -Q 200000 -S 1<br></div><div> >where:<br></div><div> ><a href="http://xxx.xxx.xxx.xxx">xxx.xxx.xxx.xxx</a> is the IP address of the powerdns server<br></div><div> >barbeuk.elenco is a file containing a list random third level domains.<br></div><div> ><br></div><div> >What we are finding is that we can't go above 1000 queries per second >and we can't understand why since using UDP we can handle more than >30000 queries per second.<br></div><div> ><br></div><div> >We are probably missing something relevant in the configuration, but we >can't understand what.<br></div><div> >Which are the most important configurations to be considered concerning >the performances in TCP?<br></div><div> ><br></div><div> >We are using powerdns version 4.7.3.<br></div><div> >Thanks.<br></div><div> >Riccardo<br></div><div> ><br></div></blockquote><div style="color: black;font-size: 14px;"><br></div></body></html>