RFR: 8308643: Incorrect value of 'used' jvmstat counter

Sat Jun 17 01:00:37 UTC 2023

Hi all,

This pull request contains a backport of commit [92167505](https://github.com/openjdk/jdk/commit/92167505b217c0e6074f58f8479be97bc4c776b3) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Kim Barrett on 15 Jun 2023 and was reviewed by Thomas Schatzl and Albert Mingkun Yang.

Thanks!

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Commit messages:
 - Backport 92167505b217c0e6074f58f8479be97bc4c776b3

Changes: https://git.openjdk.org/jdk21/pull/27/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=27&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8308643
  Stats: 150 lines in 5 files changed: 107 ins; 4 del; 39 mod
  Patch: https://git.openjdk.org/jdk21/pull/27.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/27/head:pull/27

PR: https://git.openjdk.org/jdk21/pull/27