RFR: 8330215: Trim working set for OldObjectSamples

[Jaroslav Bachorik]

On Sun, 14 Apr 2024 11:22:30 GMT, Markus Grönlund <mgronlun at openjdk.org> wrote:

> Greetings,
> 
> During the investigation around a potential memory leak, initially thought to be related to JFR and OldObjectSamples, but eventually reduced to https://bugs.openjdk.org/browse/JDK-8303767, a few minor improvements were made.
> 
> There is no need to save class unload typesets if there are no new unresolved entries for the epoch in the priority queue. 
> 
> Testing: jdk_jfr, stress testing
> 
> Thanks
> Markus

Marked as reviewed by jbachorik (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/18776#pullrequestreview-1999783666