RFR: 8318190: GenShen: Be less aggressive with triggers for old-gen has expanded

[Kelvin Nilsen]

On Fri, 13 Oct 2023 19:16:39 GMT, Kelvin Nilsen <kdnilsen at openjdk.org> wrote:

> This patch reduces the frequency of old-has-grown triggers in the case that old usage is smaller than a particular threshold percentage (default value 5%) of the total heap size.  In this case, old is triggered for growth no more frequently than once every N cycles, where N defaults to 50.

I'll leave this in draft mode until I pass tests.  I will link to a JBS issue when I mark PR as ready for review.

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PR Comment: https://git.openjdk.org/shenandoah/pull/341#issuecomment-1762064461