RFR: JDK-8262163: Extend settings printout in jcmd VM.metaspace

[Yang Yi]

On Tue, 23 Feb 2021 06:08:08 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> This is quite trivial. 
> 
> jcmd VM.metaspace prints metaspace settings at the end of its printout. Missing from that printout are some settings which would be nice to see here, eg the GC thresholds and CDS settings (nice to know since CDS affects how metaspace is used).
> 
> Example output:
> 
> Settings:
> MaxMetaspaceSize: 17179869184,00 GB
> CompressedClassSpaceSize: 1,00 GB
> Initial GC threshold: 20,75 MB
> Current GC threshold: 21,50 MB
> CDS: on
> MetaspaceReclaimPolicy: balanced
> -------
> Tests: Manually ran runtime/Metaspace/PrintMetaspaceDcmd.java.

Looks good! IMHO, can we simply reorder these settings? i.e.

Settings:
AppCDS: on
Initial GC threshold: 20,75 MB
Current GC threshold: 21,50 MB
MaxMetaspaceSize: 17179869184,00 GB
MetaspaceReclaimPolicy: balanced
CompressedClassSpaceSize: 1,00 GB

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PR: https://git.openjdk.java.net/jdk/pull/2686