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[Xen-users] Xen PV Memory counting issues

  • To: <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Inception Hosting" <inbox@xxxxxxxxxxxxxxxxxxxx>
  • Date: Mon, 27 Feb 2012 12:38:24 -0000
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  • List-id: Xen user discussion <xen-users.lists.xen.org>
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I Folks,

 

Wonder if anyone has any ideas on this one?

 

I have a server with 16GB RAM

1.5GB reserved for Dom0

 

If I run xm or xl list I get exactly 14GB of DomU’s

 

Xm or xl info shows 281 MB Free

 

total_memory           : 16374

free_memory            : 281

 

Which means XEN thinks I have used 14.22 GB for DomU’s

 

CentOS 5.7 64bit

Xen 4.1.2

(SolusVM On Top)

 

Is this some XEN thing that is not well documented, e.g. to create a 1024 MB RAM DomU XEN actually requires an additional 3 MB overhead or something like that?

 

Thanks, and any suggestions no matter how small or based in theory only are welcome.

 

Anthony.

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