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  1. JDK
  2. JDK-8059452

G1: Change the default values for G1HeapWastePercent and G1MixedGCLiveThresholdPercent

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    • gc
    • b35

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      Description

        When the flags G1HeapWastePercent and G1MixedGCLiveThresholdPercent were introduced their default values were picked without much performance analysis.

        Recent performance runs indicate that G1HeapWastePercent often benefit from a lower value and that G1MixedGCLiveThresholdPercent benefit from a higher value.

        Suggestion is to change the default for G1HeapWastePercent to 5 (used to be 10) and G1MixedGCLiveThresholdPercent to 85 (used to be 65).

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            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8059890 G1: Change the default values for G1HeapWastePercent and G1MixedGCLiveThresholdPercent

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8063345 G1: Change the default values for G1HeapWastePercent and G1MixedGCLiveThresholdPercent

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8071081 G1: Change the default values for G1HeapWastePercent and G1MixedGCLiveThresholdPercent

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8083089 G1: Change the default values for G1HeapWastePercent and G1MixedGCLiveThresholdPercent

            • P3 - Major loss of function.
            • Resolved
            relates to

            Task - A task that needs to be done. JDK-8060185 Update GC tuning guide with new default values for G1HeapWastePercent and G1MixedGCLiveThresholdPercent

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

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                brutisso Bengt Rutisson (Inactive)
                brutisso Bengt Rutisson (Inactive)
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