JDK-8227225 : ParallelGC: add subspace transitions for young gen for gc+heap=info log lines
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2019-07-03
  • Updated: 2019-08-12
  • Resolved: 2019-08-07
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JDK 14
14 b09Fixed
Related Reports
Blocks :  
JDK-8229120 - Intermittent gc/stress/gclocker/TestExcessGCLockerCollections.java test failures
Relates :  
JDK-8223575 - add subspace transitions to gc+metaspace=info log lines
Relates :  
JDK-8227224 - GenCollectedHeap: add subspace transitions for young gen for gc+heap=info log lines
Description
Currently, the gc+heap=info log lines for ParallelGC look as follows:

[11.123s][info][gc,heap      ] GC(17) PSYoungGen: 4759616K->1664K(4545536K)
[11.123s][info][gc,heap      ] GC(17) ParOldGen: 1280K->1280K(1376256K)

Similarly to JDK-8223575, it will be vey helpful to add size transitions for the young gen sub spaces (at least Eden and From-Space).

While I'm at it, I'll also add the capacity before the GC (again, similar to the change for JDK-8223575) as, in certain situations, it can change during the GC.
Comments
URL: https://hg.openjdk.java.net/jdk/jdk/rev/f81dbe27a7b1 User: tonyp Date: 2019-08-06 19:18:33 +0000
07-08-2019