[vbox-dev] Transparent Memory Compress

Klaus Espenlaub klaus.espenlaub at oracle.com
Fri Jan 21 07:45:08 PST 2011

On 20.01.2011 15:33, Howard Su wrote:
> Does vbox has this feature or in the road-map? If not, someone is
> familiar with the code base can show me some lights on what's the start
> point to add this feature?

What do you mean with "compress" - identifying indentical pages between 
VMs and eliminating the duplicates? That's been added in VBox 3.2, page 

True compression of memory pages doesn't sound sensible to me at the VM 
level - we don't know as much about the meaning/use pattern of a memory 
page than the guest OS. Compressing the wrong pages would potentially do 
more harm than good. It's a feature which is popping up in some 
operating systems, and there it makes sense.


> --
> -Howard
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