Tuesday, April 14, 2015
To ensure the correct amount of memory is allocated to DOM0 Oracle propagates the below mentioned algorithm to be used:
dom0_mem = 502 + int(physical_mem * 0.0205)
As an example this would mean that a server with 2 GB of physical memory would need 543MB of memory allocated to DOM0. A server with 32 GB of physical memory would need 1173MB of memory allocated to DOM0..
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