KVM - Suspend Guest

Suspension is a way to immediately “pause” a guest so that it no longer uses the CPU, disk, or network.

However, it will continue to reside in memory.

NOTE: An alternative to Suspension is to save/load a session instead, which would mean it no longer takes up memory, but can be restored to its exact state (even after a reboot).

See: Save Guest and Restore Guest

WARNING: A suspended session will be lost if the host system is rebooted.

However, a saved guest does persist.

virsh suspend VM_ID_OR_NAME