JDK-8140330 : Keep multiple retained old gen regions across GCs
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 9
  • Priority: P4
  • Status: Open
  • Resolution: Unresolved
  • Submitted: 2015-10-22
  • Updated: 2019-02-11
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Other
tbdUnresolved
Related Reports
Relates :  
JDK-8067433 - Keep waste at end of regions for further allocation during GC
Relates :  
JDK-8030849 - Investigate high fragmentation/waste in some situations during allocation during GC in G1
Description
 JDK-8067433 introduced retaining regions during GC, but kept a single retained region at the end of the GC.

In some cases it might be useful to keep allocating at the end of all retained regions (which are in the list introduced by  JDK-8067433) in the next GC.