IV61564: INCONSISTENT STARTUP PERFORMANCE WHEN -XSHARECLASSES OPTION IS U SED

PI28435: SHIP JAVA apar IV66110 for WAS V8553 using Java 7.1

APAR status

• Closed as program error.

Error description

• Error Message: N/A
  .
  Stack Trace: N/A
  .
  N/A
  

Local fix

• N/A
  

Problem summary

• When two different JVMs connect to the same shared class cache
  and the first one uses -Xnoaot, it's sometimes possible that the
  startup time for the second JVM be somewhat (5-15%) longer. A
  typical scenario is WebSphere Application Server when used in
  conjunction with a NodeAgent. The problem is more pronounced on
  systems with limited number of CPUs (1-2).
  

Problem conclusion

• The JIT compiler has been fixed to eliminate this intermittent
  startup performance issue
  .
  This APAR will be fixed in the following Java Releases:
     7 R1 SR1 FP1   (7.1.1.1)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, Java maintenance is available
  from:
             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

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R130 PSY

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