It happens often to have to do maintenance on Virtual Machines bacause of an exhaustion of computing resources. A web server with many more visitors than those predicted when it was sized, a database server with newly added application, there are many examples.

In thse situations, a sysadmin schedules the activity on the virtual machine in non working hours(usually nights or weekends), stops the VM, changes settings by adding more cpu or ram, and restarts the VM. Even if this task takes only few minutes, it would be possible to avoid it completely by choosing a compatible guest OS and pre-emptively configure More >