Sporadic Timeouts after upgrading to bind9.20

[Klaus Darilion]

Hello!

On our production name servers we have check every 30s if bind is alive by sending a SOA query to bind. Today I upgraded a few nodes from 9.18.x (x between 17 and 27) to 9.20.1 (Ubuntu 24.04 with packages from ISC ppa).

Since that, we have sporadic timeouts (3s). On the nodes with more qps we see it more often.

Before I dig into the problem, are there any specific changes to 9.20 that I should look at? Maybe some default value changes for socket buffers, thread handling ...?

Thanks
Klaus

--
Klaus Darilion, Head of Operations
nic.at GmbH, Jakob-Haringer-Straße 8/V
5020 Salzburg, Austria

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