@Override
  protected void closeProcessStats() {
    if (osStatisticsProvider.osStatsSupported()) {
      if (!osStatsDisabled()) {
        if (processStats != null) {
          processStats.close();
        }
        osStatisticsProvider.closeOSStats();
      }
    }
  }
Returns the <code>ProcessStats</code> for this Java VM. Note that <code>null</code> will be
returned if operating statistics are disabled.

@since GemFire 3.5
geode-core/src/main/java/org/apache/geode/internal/statistics/GemFireStatSampler.java