[Users] Query on Load balancing policies.

Hi, I have been trying out various cluster policies on latest ovirt. On enabling Load Balancing policy: power saving, I have observed migration of VMs and consolidating them on fewer hosts resulting in under utilised hosts cleared of VMs. Is the onus on the administrator to switch off all under utilized systems ? Is there any knob I am missing that automatically turns off under utilized hosts and powers on the hosts on a need basis. Regards, Deepthi