Michael Hillmdhill@gnome.org2014Specify RAM and maximum disk allocation.Adjust the system requirements of a box
In Boxes, each virtual machine has its own settings for RAM and
maximum allocated disk space.
Right-click on the box in the collection view and select
Properties, or if the box is running, click the menu
(settings)
button in the header bar and select Properties.
Click the System tab.
Adjust the Memory and Maximum disk size
sliders to reflect the desired values.
You shouldn't allocate all the memory available as your host system also needs memory to run
and the more memory is allocated, the longer it will take to suspend/resume.
The recommended memory will be sufficient since this information comes from the OSes documentations.