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  1. JDK
  2. JDK-8338977

Parallel: Improve heap resizing heuristics

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    • Icon: Enhancement Enhancement
    • Resolution: Fixed
    • Icon: P4 P4
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    • gc
    • b09

      Some changes in Parallel altered the GC behavior, and the adaptive-size-policy balancing mutator-throughput and generation/heap is specially tuned to the old GC behavior, so the heuristics cause some regressions in out-of-the-box performance observed in JDK-8333227, JDK-8338689 and JDK-8332485. All those regressions can be worked around using manually set generation/heap sizes. However, some work should be done to address the out-of-the-box performance of those benchmarks.

      Improve the heuristics (such as, taking gc-frequency into account, proactive full-gc to clear out floating garbage in old-gen, lazy-generation shrinking, etc) to restore the out-of-the-box performance.

            ayang Albert Yang
            ayang Albert Yang
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