You don't have to tune the Java GC - I never have, and I use and write Java apps all the time. People can and for big servers often do, to squeeze out more per

You don't have to tune the Java GC - I never have, and I use and write Java apps all the time. People can and for big servers often do, to squeeze out more performance or better latency, but it is definitely not required. In the presentation I linked to, GC tuning (after switching to G1) reduced tail latencies a bit, but otherwise did not radically change anything.