RFR: 8311514: Incorrect regex in TestMetaSpaceLog.java

[Daohan Qu]

On Thu, 6 Jul 2023 09:23:06 GMT, Daohan Qu <dqu at openjdk.org> wrote:

> The regex in jtreg test `TestMetaSpaceLog.java` is intended to capture the metaspace size before and after the reclamation. But it captures the wrong value. which might cause this test to always pass. The results of the capture can be displayed using a visualization tool.
> 
> Before this patch:
> <img width="1128" alt="屏幕快照 2023-07-06 17 18 15" src="https://github.com/openjdk/jdk/assets/18374295/4e3b6606-24b3-4d7f-a70d-f312cb867fbf">
> 
> After this patch:
> <img width="1125" alt="屏幕快照 2023-07-06 17 18 25" src="https://github.com/openjdk/jdk/assets/18374295/b100018e-2c39-4154-9ec7-80e5eedc212e">

I have pushed a new commit to match more parts of the metaspace change log and added a comment in this test.

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PR Comment: https://git.openjdk.org/jdk/pull/14782#issuecomment-1623490957