RFR: 8318190: GenShen: Be less aggressive with triggers for old-gen has expanded [v3]

[Kelvin Nilsen]

On Mon, 16 Oct 2023 23:17:34 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.
>
> Kelvin Nilsen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix whitespace

src/hotspot/share/gc/shenandoah/shenandoah_globals.hpp line 62:

> 60:           "is below ShenandoahGenerationalIgnoreOldGrowthBelowPercentage, " \
> 61:           "trigger an old-generation mark if old has grown and this "       \
> 62:           "many young-gen consecutive young-gen collections have been "     \

will remove redundant young-gen from this sentence

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PR Review Comment: https://git.openjdk.org/shenandoah/pull/341#discussion_r1362347837