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19.06.0.0

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19.06.0.0

Release date: June 25, 2019

This release corresponds to the following OpenJDK versions:

Major Version OpenJDK Version

8

11

13

15

What’s New

  • Zing 19.06.0.0 introduces a new Zing Virtual Machine mode.

    The following new command-line options for enabling and working with the new Zing Virtual Machine mode are introduced:

    • UseZST

    • NonZSTModePreferenceLevel

    • UseLargePages

    • UseTransparentHugePages

    • GPGCNoZSTBackingStoragePath

    • GPGCNoZSTWorkaroundRSSInaccuracy

    • GPGCNoZSTUseNUMAInterleaving

    • AlwaysPreTouch

  • The new Zing Virtual Machine mode may require tuning to achieve the best results.

  • Zing 19.06.0.0 introduces a new core-bundler utility to manage core file bundling.

  • Enhancements for the ReadyNow performance tuning tool.

  • Installing Zing Standalone Licenses is updated to include a list of locations checked for a license in order of priority.

Resolved Issues

Issue ID Description

Known Issues

Issue ID Description

19127

When used in -XX:-UseZST mode, applications that allocate significant amounts of large (multi-MB) objects at high rates and on a sustained basis may observe higher than normal time to safepoint behaviors.

16473

When Zing is used in the Non-ZST mode, the RSS/RES value reported by such Linux tools as top or ps are known to be inaccurate because multi-mapped regions are counted multiple times by those commands, even though they point to the same physical memory. For more details, see [top-and-ps] above.