RFR: 8258431: Provide a JFR event with live set size estimate [v12]

Tue Mar 16 11:41:12 UTC 2021

On Tue, 16 Mar 2021 11:28:50 GMT, Stefan Johansson <sjohanss at openjdk.org> wrote:

> The other STW GCs do report the same, right?

They report the lower bound - basically the real live size right at the end of a GC cycle (either gathered during marking or the used size after compaction). Of course, a few moments later it might (and probably will) not be 100% correct but that's why it is just an estimate.

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PR: https://git.openjdk.java.net/jdk/pull/2579