Installing and Managing HP-UX Virtual Partitions (A.02.01)

Managing Virtual Partitions
Memory Allocation
Chapter 350
Memory Allocation
Memory Assignment By Size
To allocate a subset of physical memory to a virtual partition, you specify
the desired amount of memory (a size) to allocate to a partition using the
mem::< size > parameter in the vparcreate or vparmodify commands.
For example, to create a partition with 1024 MB of memory, the
command is:
# vparcreate -p vpar2 -a mem::1024
When specifying memory by size, note the following:
• The unit for the specified size of memory is megabytes not gigabytes.
• Memory is allocated in multiples of 64 MB. Any specified size that is
not a multiple of 64 MB is rounded up to the nearest 64 MB
boundary.
For example, if you specify 1 MB, 64 MB will be allocated.
• The default memory size is 0 MB, so you need to specify enough
memory for your applications and the operating system.
• When modifying the amount of memory assigned to a partition, the
target partition must be down.
Specifying a Range
Although you can specify memory ranges using -amem::: base : range
(for details, see the manpages), this is not recommended.
The only time you would specify memory by range is for NUMA. The
rp5470/L3000 and rp7400/N4000 servers do not have NUMA
architectures, so there is no need to specify ranges with these servers.
Although the Superdome has a NUMA architecture, the HP-UX OS does
not yet support the NUMA features.