HostSystem CPU and Memory returns 0

Hi All,

I wrote below script to get Current CPU & Memory Usage on HostSystem in VCO 5.5, but below code always returns 0. Can someone help to resolve ? Is there any other way to get the Current Usage/Utilization ?

var myClusterOverallCpuUsage=0;

var  myClusterOverallMemoryUsage=0;

var myVcHostSystem = VcPlugin.allHostSystems

myClusterOverallCpuUsage = myVcHostSystem[0].summary.quickStats.overallCpuUsage;

myClusterOverallMemoryUsage = myVcHostSystem[0].summary.quickStats.overallMemoryUsage;

System.log( "name:" +myVcHostSystem[0].name);

System.log( "CPU usage"+myClusterOverallCpuUsage);

Thanks