IV86809: HIGH PAUSE PGC GC CYCLE WHERE EXCESS TIME IS SPENT BETWEEN THE S WEEP AND COPY FORWARD OPERATIONS

APAR status

• Closed as program error.

Error description

• Error Message: With Balanced GC, random Partial Garbage
  Collect(PGC) GC cycles take more time, with GC spending time
  between the GC operations sweep and copy forward.
  For example:
  <exclusive-start id="2457" timestamp="2016-04-20T00:29:27.352"
  intervalms="93367.433">
  ...
  <gc-op id="2462" type="sweep" timems="27.418" contextid="2459"
  timestamp="2016-04-20T00:29:27.381" />
  <gc-op id="2463" type="copy forward" timems="62.011"
  contextid="2459" timestamp="2016-04-20T00:36:02.976">
  ...
  <exclusive-end id="2468" timestamp="2016-04-20T00:36:02.978"
  durationms="395626.087" />
  .
  Stack Trace: N/A
  .
  

Local fix

Problem summary

• The problem is caused when a particular PGC calculation takes an
  excess amount of time.
  

Problem conclusion

• The Balanced GC has been updated to handle the case where the
  PGC attributes cause lengthy calculation.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR3 FP11  (8.0.3.11)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  Service Refreshes and Fix Packs can be found at:
             https://www.ibm.com/developerworks/java/jdk/
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R270 PSY

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