[CentOS] Sharing RAM between VM

Jim Wildman jim at rossberry.com
Tue Apr 14 17:58:12 UTC 2009

On Tue, 14 Apr 2009, Larry wrote:

> Hi, all!
> I have a server with 4 virtual machines ( using xen). Is there a way to
> make them share RAM? I found out something about balloons, but it didn't
> distribute RAM dynamically. So I decided that xen can't achieve that.
> I tried luci and ricci and now all my VMs are in a cluster. But I don't
> think this actually helped.
> Can you suggest a software and/or manual or a question which I should
> ask google for completing this task?

'over commit' of RAM is the phrase you are probably looking for.  And
this is one of the limitations of Xen (it doesn't).

Jim Wildman, CISSP, RHCE       jim at rossberry.com http://www.rossberry.com
"Society in every state is a blessing, but Government, even in its best
state, is a necessary evil; in its worst state, an intolerable one."
Thomas Paine

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