@Override
  protected Properties getDistributedSystemProperties() {
    Properties dsProps = super.getDistributedSystemProperties();
    dsProps.setProperty(OFF_HEAP_MEMORY_SIZE, "1m");
    return dsProps;
  }
Tests PartitionedRegion DataStore currentAllocatedMemory operation.

@since Geode 1.0
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/PRDataStoreMemoryOffHeapJUnitTest.java