RFR: 8297247: Add GarbageCollectorMXBean for Remark and Cleanup pause time in G1 [v3]

[Yude Lin]

On Fri, 2 Dec 2022 07:19:28 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>>> Some additional comments, mainly on the tests. This change also needs a release note to announce the new GC MXBean.
>> 
>> Do you think the latest commit addresses your concerns? I put up a release note here https://bugs.openjdk.org/browse/JDK-8297247
>> please review : )
>
>> I put up a release note here https://bugs.openjdk.org/browse/JDK-8297247 please review : )
> 
> I did not really understand the sentence "As a `MemoryManagerMXBean`, this bean manages the "G1 Old Gen" memory pool." and changed it to "These pauses now also update the "G1 Old Gen" `MemoryManagerMXBean` memory pool."
> 
> Other than that I added a few newlines here and there to form paragraphs.
> 
> Consider the release note reviewed by me - there is no other formal sign-off requirement. Just change it to the state as indicated in the openjdk wiki after pushing this.

Thank you @tschatzl . Are you able to sponsor this change?

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PR: https://git.openjdk.org/jdk/pull/11341