High CPU in cluster - vRealize Report

Hi,

I have a VMware Clustering running around 500 Virtual machines and every weekend at a certain time it has an increase of CPU for around 12 hours. I have been told it isn't our virus scaning as well.

I am wanting to drill into the VMs to see what ones are causing the increase of CPU in the cluster. Do you know how I would use vRealize in this situation? We are running version 6.6

Thanks.