Adjust the system requirements of a box

In Boxes, each virtual machine has its own settings for RAM, CPU and maximum allocated disk space.

  1. Right-click on the box in the collection view and select Preferences, or if the box is running, click the menu (settings) button in the header bar and select Preferences.

  2. Click the Resources tab.

  3. Adjust the Memory, CPU 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.