private Statistics fetchSystemStats() {
    if (osStatisticsProvider.osStatsSupported()) {
      Statistics[] systemStats = system.findStatisticsByType(LinuxSystemStats.getType());

      if (systemStats != null) {
        return systemStats[0];
      }
    }
    return null;
  }
This class acts as an Bridge between MemberMBean and GemFire Cache and Distributed System
geode-core/src/main/java/org/apache/geode/management/internal/beans/MemberMBeanBridge.java