@Override
      public Object call() throws Exception {
        ResourceManager irm = getCache().getResourceManager();
        irm.setCriticalHeapPercentage(criticalThreshold);
        irm.setEvictionHeapPercentage(evictionThreshold);
        return null;
      }
Starts up a CacheServer.

@return a {@link ServerPorts} containing the CacheServer ports.
geode-core/src/distributedTest/java/org/apache/geode/cache/management/MemoryThresholdsDUnitTest.java