A system may include multiple computing nodes, each including a hypervisor, a controller virtual machine and multiple virtual machines. The hypervisor may include a host agent configured to start a service and determine whether a performance of the service has met a criteria. If the performance of the service has met the criteria, the hypervisor may further determine whether the service has any pending critical operations, and if no critical operations are pending, stop the service. In some examples, each service may create a process configured to monitor the performance of the service. Examples of the performance of the service may include memory utilization and the service response time.