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I once found a way to show the current tenuring threshold (among other things) for the Hotspot JVM. I believe it was a JVM option that was configurable to print the information at a specified interval to stdout. I can’t find it now. What option/tool am I looking for to do this?
I believe you’re looking for :
-XX:+PrintTenuringDistribution. Did you look here? I should ask: Why do you care? It’s generally not recommended to tinker with these flags unless you really know what you’re doing. I would stick to sizing my heap and let the JVM ergonomics do the rest.