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  1. JDK
  2. JDK-8247748

Investigate default alpha for G1 adaptive IHOP allocation rate

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    Details

    • Type: Enhancement
    • Status: Open
    • Priority: P4
    • Resolution: Unresolved
    • Affects Version/s: 16
    • Fix Version/s: tbd
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
      gc

      Description

      Currently G1 uses an alpha of 0.95 for its adaptive IHOP allocation rate calculation, i.e. the latest value is weighed at 95%.

      Behavior seems to be the same with the default value; in order to reduce the amount of magic numbers I propose to use the default 0.7 instead for now.

      There is no good explanation of why, and the original change does not clarify either. Investigate whether a better value can be found.

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              Assignee:
              Unassigned Unassigned
              Reporter:
              tschatzl Thomas Schatzl
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                Created:
                Updated: