It is possible to edit the parameters that are used to start any virtual machine within Oracle VM using Oracle VM Manager. Typical changes may include updating the keymap, mouse device type, memory or CPU allocation or to enable huge page support. It is important to understand that these parameters are runtime parameters used by the hypervisor to initialize a virtual machine. This means that making changes to these parameters do not have an immediate effect on a running virtual machine. For changes to take effect, the virtual machine must be stopped and then started again, so that the hypervisor is forced to reload the virtual machine configuration. A simple restart does not have the same effect, since the hypervisor does not reload the virtual machine configuration for this event.