How can i know in real time the occupation of the RAM and CPU of a VM running in KVM Hypervisor for OpenNebula

i am trying to develop scripts shell that will allow the dynamic migration of VMs following an action , for example: overloading a physical node resources (RAM, CPU) . to take the decision on the choice
of the VM to migrate, I need to know the occupation of the RAM / CPU in real time of a VM , if someone can help me
thank you in advance

onevm show gives you that info but not realtime. It gets refeshed every 20 seconds:

$ onevm show 0
VIRTUAL MACHINE MONITORING                                                      
USED MEMORY         : 952M                
USED CPU            : 0        
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thank you for your help :relaxed: