Chapter 2. Setting Up a Virtual Machine Host / 2.3. Managing Domain 0 Memory | ||||
|---|---|---|---|---|
 | 2.2. Setting Up a 32-Bit Domain 0 on a 64-Bit Hypervisor | 2.4. Starting the Virtual Machine Host |  | |
Chapter 2. Setting Up a Virtual Machine Host / 2.3. Managing Domain 0 Memory | ||||
|---|---|---|---|---|
| 2.2. Setting Up a 32-Bit Domain 0 on a 64-Bit Hypervisor | 2.4. Starting the Virtual Machine Host | | |
When the host is set up, a percentage of system memory is reserved for the hypervisor, and all remaining memory is automatically allocated to Domain0.
A better solution is to set a minimum and maximum amount of memory for domain 0, so the memory can be allocated appropriately to the hypervisor. An adequate maximum amount would be 20 percent of the total system memory up to 2 GB. An appropriate minimum amount would at least be 512 MB.
Determine the amount of memory to set for domain 0.
At Domain0, type xm list to view the currently allocated memory.
Run +.
Select the Xen section.
In , add
dom0_mem= mem_amount
where mem_amount is
the maximum amount of memory to allocate to Domain0. Add
K, M, or
G, to specify the size, for example,
dom0_mem=768M.
Restart the computer to apply the changes.
To set a minimum amount of memory for Domain0, edit
the dom0-min-mem parameter in the
/etc/xen/xend-config.sxp file and restart xend. For more
information, see Section 4.2, “Controlling the Host by Modifying xend Settings”.
