Installing and Managing HP-UX Virtual Partitions (includes A.04.01)

CPU, Memory, and IO Resources
Memory: Concepts and Functionality (vPars A.04, A.03 and earlier)
Chapter 6
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Memory: Concepts and Functionality
(vPars A.04, A.03 and earlier)
Acronyms
ILM Interleaved Memory. (vPars A.04.xx, A.03.xx, A.02.xx)
• The nPartition’s system default is to have all memory configured as ILM.
• vPars A.03.xx and A.02.xx use and assign only ILM; vPars A.04.xx allows use of ILM
and CLM.
CLM Cell Local Memory. (A.04.xx only)
• Using nPartition commands, you can re-configure a portion of a cell’s ILM memory to be
used instead as CLM. Beginning with vPars A.04, you can assign an amount of available
CLM to a virtual partition.
• This capability should be used only if you are an advanced administrator. Further, CLM
is meant to be used in conjunction with CLP (cell local processor); not doing so may
actually cause performance degradation.
Assignments
You assign memory to a virtual partition:
• by size
this uses the nPartition’s ILM.
• by cell and a corresponding size
this uses the specified cell’s CLM.
Within the available nPartition’s ILM or cell’s CLM, you can also
• specify an address range to use
This does not increase the amount of memory assigned to the virtual partition. The address range is a
specific subset of the existing ILM or CLM amount assigned to the virtual partition. Therefore, the total
amount of memory specified by ILM or CLM addresses cannot exceed the amount of ILM and CLM
assigned to the virtual partition.
NOTE The virtual partition must be in the down state to add or delete memory resources.
Granularity
Granularity refers to the unit size in which memory is assigned to the all virtual partitions in a given vPars
database (vpdb). You should be careful when using the granularity option; using the granularity option
incorrectly can cause all the virtual partitions to not be bootable. For information, see “Memory: Setting
Granularity Values (vPars A.04)” on page 167.