HP-UX Virtual Partitions Administrator's Guide (includes A.03.05 and A.04.05)

Example
To create the virtual partition keira2 with 3 CPUs, set num to 3:
keira1# vparcreate -p keira2 -a cpu::3 ...
vparmodify
With the vparmodify command, you can use the following:
-a option to add num CPUs to the virtual partition.
-d option to delete num CPUs from the virtual partition.
-m option to modify (set) to num the number of CPUs assigned to the partition. The vPars
Monitor automatically will add or delete CPUs to or from the virtual partition to reach num
CPUs.
Examples
If an existing partition has 2 CPUs and you would like to set the number of CPUs to 3, you
can modify the number of CPUs assigned to the partition by using the -m option and setting
num to 3:
keira1# vparmodify -p keira2 -m cpu::3
To set the number of CPUs back to two, use the -m option and set num to 2:
keira1# vparmodify -p keira2 -m cpu::2
If you would like to add 1 CPU to an existing partition, regardless of its current CPU count,
you can add 1 CPU by using the -a option and setting num to 1:
keira1# vparmodify -p keira2 -a cpu::1
To remove the added CPU from the partition, use the -d option and set num to 1:
keira1# vparmodify -p keira2 -d cpu::1
196 CPU, Memory, and I/O Resources (A.05.xx)