[Pdns-users] PowerDNS tcp query rate

[Alan Holmes]

Hello,
Very interesting issue indeed. I came across a similar problem in the 
past.
In order for me to understand what you are missing, can you share the 
configuration you have used and the target IP.
If you will also share some of the random third level domains,
I will also verify your pdns configuration directly.

Best,
Alan



------ Messaggio originale ------
Da "Riccardo Brunetti via Pdns-users" <pdns-users at mailman.powerdns.com>
A "pdns-users" <pdns-users at mailman.powerdns.com>
Data 29/03/2023 18:03:45
Oggetto [Pdns-users] PowerDNS tcp query rate

>Hello.
>We are testing a powerdns authoritative server installation and we are 
>trying to figure out the maximum query rate in TCP mode.
>
>We use the "dnsperf" tool with the following syntax:
>
>>dnsperf -m tcp -s xxx.xxx.xxx.xxx -d barbeuk.elenco  -c 10 -T 200 -l 
>>180   -Q 200000 -S 1
>where:
>xxx.xxx.xxx.xxx is the IP address of the powerdns server
>barbeuk.elenco is a file containing a list random third level domains.
>
>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.
>
>We are probably missing something relevant in the configuration, but we 
>can't understand what.
>Which are the most important configurations to be considered concerning 
>the performances in TCP?
>
>We are using powerdns version 4.7.3.
>Thanks.
>Riccardo
>