> If you're running bind 9.10, then bind 9.10 doing prefetch is a normal > use-case. > > You make a good point that a prefetch-enabled resolver might show different > behaviour to a non-prefetch one. But we've been on prefetch-enabled resolvers > for the whole length of our o365 rollout IIRC, so I have no data to compare > to.
I was also looking into the prefetch thing: - with "prefetch 0” I am able to reproduce it every single time the TTL expires, even on quiet dev hosts - with “prefetch 2” I am able to reproduce it on loaded hosts only - with “prefetch 10” I am NOT able to reproduce it at all
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