[benzewdu]

Not even -Xms -Xmx, there's heuristics built in to appropriately size the gc spaces... http://hg.openjdk.java.net/jdk8/jdk8/hotspot/file/tip/src/sh...

[user5994461]

Right. Most applications don't need that.

It's only the server apps running 24/7 on fixed hardware that should have a defined memory usage.