Chapter 3. Optimizing Virtualization Performance with virt-manager

The virt-manager tool provides different profiles depending on what operating system type and version are selected for a new guest virtual machine. When creating a guest, you should provide as many details as possible; this can improve performance by enabling features available for your specific type of guest.

See the following example screen capture of the virt-manager tool. When creating a new guest virtual machine, always specify your intended OS type and Version:

Removing unused or unnecessary devices can improve performance. For instance, a guest tasked as a web server is unlikely to require audio features or an attached tablet.

See the following example screen capture of the virt-manager tool. Click the Remove button to remove unnecessary devices: