With a Linux host, you can oversubscribe KVM guests, and I'm starting to see it more frequently. Still haven't seen as bad as shared hosts, however. Kernel Sa

With a Linux host, you can oversubscribe KVM guests, and I'm starting to see it more frequently. Still haven't seen as bad as shared hosts, however. Kernel Same-Page Merging allows you to de-dup common pages across virtual hosts (such as kernel) for example. http://www.linux-kvm.org/page/KSM http://www.linux-kvm.org/page/KSM