Hi, yes I totally agree with you. Hope the developers will place an option to tune this functionality. Thank you Bye
> Il giorno 29 dic 2020, alle ore 10:06, Winfried Angele > <winfried.ang...@gmail.com> ha scritto: > > Hello Marcello, > > Verry good! But in my opinion the DNS server should not send out SOA queries > faster than it can pickup the answers. Raising the buffers helps only up to a > certain burst length. If you have more zones, the problem comes back. > > Winfried > > > > Am 29. Dezember 2020 09:17:06 MEZ schrieb Marcello Lupo > <ml...@itspecialist.it>: > He Winfried, > yes it seems to be the same issue. > I tried to raise the kernel rmem limits with: > > sysctl -w net.core.rmem_max=26214400 > sysctl -w net.core.rmem_default=26214400 > > and the issue seems to be solved. > I will monitor it the next days. > Thank you > Bye > Marcello > > Il giorno 28 dic 2020, alle ore 22:26, Winfried Angele > <winfried.ang...@gmail.com> ha scritto: > > Hi Marcello, > > It looks like this is the same issue which I reported already: > > https://github.com/PowerDNS/pdns/issues/9112 > > Maybe you can report your observations there as well. > > Winfried > > > Am 28. Dezember 2020 21:41:21 MEZ schrieb Marcello Lupo via Pdns-users > <pdns-users@mailman.powerdns.com>: > Hello, > I have configured a PDNS Authoritative server (v 4.4.0) with many slave zones > provisioned with superslave and supermasters mechanism. > At the moment I have around 1400 zones provisioned from 5 bind master servers. > > I’m getting a lot of: > > Dec 28 21:00:02 pdns-db2 pdns_server-global[6838]: Received serial number > updates for 374 zones, had 19 timeouts > Dec 28 21:05:23 pdns-db2 pdns_server-global[6838]: Received serial number > updates for 395 zones, had 47 timeouts > Dec 28 21:06:34 pdns-db2 pdns_server-global[6838]: Received serial number > updates for 303 zones, had 15 timeouts > Dec 28 21:16:07 pdns-db2 pdns_server-global[6838]: Received serial number > updates for 394 zones, had 43 timeouts > Dec 28 21:21:25 pdns-db2 pdns_server-global[6838]: Received serial number > updates for 599 zones, had 66 timeouts > Dec 28 21:22:41 pdns-db2 pdns_server-global[6838]: Received serial number > updates for 521 zones, had 22 timeouts > Dec 28 21:26:56 pdns-db2 pdns_server-global[6838]: Received serial number > updates for 455 zones, had 28 timeouts > Dec 28 21:28:08 pdns-db2 pdns_server-global[6838]: Received serial number > updates for 235 zones, had 26 timeouts > > I checked with tcpdump on both the master DNS and the powerdns itself and all > answers to the AXFR requests starting from pdns server are correctly received > on the pdns server but seems that are not handled by the system and give the > timeout error. The udp-in-errors counter is raising every time of the exact > number of the timeouts received. As the documentation says the udp-in-errors > value seems to be related to packet received but cannot be handled from the > pdns server itself. > I’m almost sure that it is a problem of resource tuning but I haven’t idea of > what I should tune to avoid this behavior. > In the short future we will need to reach around 15k domains managed by this > DNS server and I would like to do not have this issue. > In my scenario this server is dedicated only to the provisioning of domains > and it do not answer to requests coming from internet. Requests coming from > internet are handled from many servers balanced that rely on the mariadb > replication of the PDNS DB main server. > Do you have any ideas? > Thank you > Bye > Marcello > Pdns-users mailing list > Pdns-users@mailman.powerdns.com > https://mailman.powerdns.com/mailman/listinfo/pdns-users > _______________________________________________ Pdns-users mailing list Pdns-users@mailman.powerdns.com https://mailman.powerdns.com/mailman/listinfo/pdns-users
