@1c2c6506 Interesting. I don't suppose for a moment that they have a repro version of the app that they can open so we can have a proper dig about in it?

Tbh ~30-40 Pg calls / request sounds like it might be falling into the "Hibernate Cascade" antipattern.

There are always going to be workloads that are disturbed by the weaving that happens as a result of instrumentation. It's more a question of trying to identify how widespread (or pathological) they are.