Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8242042

Shenandoah: tune down ShenandoahGarbageThreshold

    XMLWordPrintable

Details

    • gc
    • b18

    Backports

      Description

        ShenandoahGarbageThreshold drives the collection set selection. It defaults to 60%, which means we can end up with regions that have 60% garbage that would not be collected until the memory is tight. This means that Shenandoah accepts 60% heap fragmentation in normal conditions: so, for the live data of 20GB, it might require the heap of 33GB.

        Instead, we are better off defragmenting the heap more proactively by lowering the ShenandoahGarbageThreshold.

        Attachments

          Issue Links

            backported by

            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-8244357 Shenandoah: tune down ShenandoahGarbageThreshold

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • 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-8245351 Shenandoah: tune down ShenandoahGarbageThreshold

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Activity

              People

                shade Aleksey Shipilev
                shade Aleksey Shipilev
                Votes:
                0 Vote for this issue
                Watchers:
                1 Start watching this issue

                Dates

                  Created:
                  Updated:
                  Resolved: