Differences in the default heap settings between JBoss EAP 7 and JBoss EAP 8 for OpenShift

Solution Verified - Updated -

Issue

  • In JBoss EAP 7 for OpenShift, -Xms and -Xmx java options are set by default, but not in JBoss EAP 8.
  • In JBoss EAP 8 for OpenShift, -XX:MaxRAMPercentage=80.0 is set by default. How can this value be changed?
  • In JBoss EAP 8 for OpenShift, the initial heap size is too small for our workload, and frequent Full GCs cause degrading the system performance. Which environment variable can be used to change the initial heap size?

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 7.0 for OpenShift
    • 8.0 for OpenShift

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