Embodiments of the present invention include a computer system for running a virtual manager scheduler for scheduling activities for virtual machines. The computer system may include program instructions to: define a schedule for one or more activities to be executed for a virtual machine; apply an adjustment to the schedule in accordance with feedback information received via a virtual machine client aggregating the feedback information from a plurality of virtual machine clients, each being related to a virtual machine, per scheduled activity type; and determine of a group adjustment for a determined group of the virtual machine clients based on a function of the feedback information of the plurality of virtual machine clients.