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Enhancement
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Resolution: Unresolved
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P4
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None
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.
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.
- csr for
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JDK-8356071 Parallel: Improve heap resizing heuristics
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- Draft
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- relates to
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JDK-8333227 Parallel: Regressions 1-6% in Compress-ParGC after JDK-8330670
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- Closed
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- Closed
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- Open
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- links to
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Review(master)
openjdk/jdk/25000