This is an old revision of the document!
So there is quite a bit to do when setting up for KVM. In the How To Setup Zramswap And Make Your PC Awesome we touch on setting up zram so that you can get more VM's but there is actually a way to get even better performance that I did not mention in that guide.
Here we will cover some additional tunables so once you have your zram setup so that you can have extra vm's running lets do a bit more so we can have even more memory available.
As like in zram the cost is more cpu cycles so on a very slow cpu that might not be desirable but if you have spare CPU there is no reason not to clear up some ram using things like zram or other kvm switches available. While zram compresses what ram is used to give more available, kvm can deduplicate what is used so that ram is only stored one time across machines.
Lets start by installing virtual machine manager for debian: (by the way if you ever need copy/paste functionality between the vm and your host just install “spice-client-gtk” and “spice-vdagent” package on the vm, then turn it off and back on).
sudo apt-get install virt-manager
