On 26th of September, PostgreSQL Global Development Group announced the release of version 17.
Here is an easy one: Can you guess at which point I made the upgrade?

The slope is a maintenance break. Datadog wasn't measuring HTTP-performance while I was tinkering to make the actual upgrade.
What worries me is the performance being itsy-bitsy worse with version 17. Graph is smooth as silk. However, crunching the numbers to smooth the zig-zag, 16 seems to have better performance on average. Difference isn't big, but it is there. Maybe I'm missing a new setting to improve cache performance or something?