Why is the Java heap used if the RHDG cases are configured to use OffHeapMemory?

Solution Verified - Updated -

Issue

  • After configuring the Caches to use OffHeapMemory we dreastical reduced the JVM Heap but run into a OutOfMemoryError: Java heap space, what is the reason for this?
  • How to set the Java Heap size if the caches are configured to use OffHeapMemory?

Environment

  • Red Hat Data Grid (RHDG)
    • 7

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