We're using unbound on our four proxy servers (and a hand-compiled, current version of squid), which channel all outbound HTTP/HTTPS traffic.
Naturally, these machine do a lot of resolving. Recently I upgraded the OS from xenial to bionic, and while everything was working as expected I noticed a significant increase in the DNS query times on those proxies. Before the update (runnung unbound 1.5.8-1ubuntu1.1) we were seeing query times around 20ms: After the upgrade (1.6.7-1ubuntu2.1) those rose to 40ms. See these graphs: https://www.arschkrebs.de/bugs/dnssvc30d.png https://www.arschkrebs.de/bugs/dnssvc1w.png I then tinkered with different package versions -- tried upgrading to 1.7.3 (no change) and finally downgraded back to to 1.5.8-1ubuntu1.1 - and the query times dropped to pre-update levels. Is that to be expected? Is it a regression? I'm a bit late to notice, but I thought I'd rather ask. -- Ralf Hildebrandt Charite Universitätsmedizin Berlin ralf.hildebra...@charite.de Campus Benjamin Franklin https://www.charite.de Hindenburgdamm 30, 12203 Berlin Geschäftsbereich IT, Abt. Netzwerk fon: +49-30-450.570.155