swappiness

Ubuntu: Using a swap file instead of swap partition for virtualized server VMs

Before virtualization, there was a stronger argument for using a swap partition instead of a swap file for servers.  A fragmented swap file could lead to performance issues that a statically sized and placed partition did not have consider. But once virtualization comes into play, unless you go to great lengths to segment your storage Ubuntu: Using a swap file instead of swap partition for virtualized server VMs