Correctly calculate the amount of memory needed for DOM0 when using Oracle VM.

1. Oracle VM – DOM0 memory
Johan Louwers

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Oracle VM – Johan Louwers | April 2015
Oracle VM – High Level Architecture

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Oracle VM – Johan Louwers | April 2015
Oracle VM – DOM0
Dom0 is the initial domain started by the Xen hypervisor on boot. Dom0 is an abbrevation of
"Domain 0" (sometimes written as "domain zero" or the "host domain"). Dom0 is a privileged
domain that starts first and manages the DomU unprivileged domains.

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Oracle VM – Johan Louwers | April 2015
Oracle VM – Ring Stacks
Source : https://community.emc.com

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Oracle VM – Johan Louwers | April 2015
Oracle VM – calculation
dom0_mem = 502 + int(physical_mem * 0.0205)
To change the Dom0 memory allocation, edit the /boot/grub/grub.conf file on the Oracle
VM Server and change the dom0_mem parameter, for example, to change the memory
allocation to 1024 MB, edit the file to be:
kernel /xen.gz console=com1,vga com1=38400,8n1 dom0_mem=1024M

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Oracle VM – Johan Louwers | April 2015
Contact
Johan Louwers
Capgemini Managing Consultant, Lead Architect Oracle Technology

7. www.capgemini.com
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