public int heapSizePercentageOfAvailable() {
        return getHostClusterId().isPresent() ?
                heapSizePercentageOfTotalAvailableMemoryWhenCombinedCluster :
                heapSizePercentageOfAvailableMemory;
    }
The heap size % of total memory available to the JVM process.
config-model/src/main/java/com/yahoo/vespa/model/container/ApplicationContainerCluster.java