JDK-8219643 : Purge CLDG concurrently in G1
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 13
  • Priority: P4
  • Status: Open
  • Resolution: Unresolved
  • Submitted: 2019-02-25
  • Updated: 2019-03-18
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Other
tbdUnresolved
Related Reports
Relates :  
JDK-8213752 - Determine StringTable content liveness concurrently in G1
Description
Due to changes for concurrent class unloading for ZGC metaspace purging can (and should be) done concurrently as this can take a significant amount of time.

Note that purging activity should be properly synchronized with garbage collection requests to avoid delaying them; further, while a CLDG purge is running, care may need to be taken about additional class unloading/CLDG purge attempts.