I'm running a fairly small #Java service, and recently switch it over to Generational ZGC. Turns out ZGC scales down quite well. After the heuristics settled, max heap is now kept below 300 MiB, which is less than what we got with G1GC. Pause times are also much lower, with sum total pause per minute occasionally reaching 1 ms, but is usually sub-ms. I can see why they want to make this the default in Java 23.
