Granularity refers to the
unit size by which memory assigned to all virtual partitions in a
vPars database (vpdb) can be increased or decreased. Granularity reflects
only the unit size of memory and not the amount of memory that is
assigned.
This section briefly covers configuring memory
granularity.
The default granularity is 128 MB for ILM and
128 MB for CLM. However, you can specify your own granularity for
CLM and/or ILM. Granularity has some specific restrictions and cannot
be changed in a vPars database after they are set. Be sure to read
the CAUTION portion in the next section.
Granularity Value Locations |
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Integrity Systems. There are two areas where granularity values are set:
The nPartition firmware, specifically the EFI variables
in NVRAM (non-volatile RAM).
The vPars database.
In order for the virtual partitions in the vPars
database to be able to boot, the granularity values in the vPars database
must match the granularity values in the firmware.
On Integrity systems, memory is divided into the
granules by the firmware; therefore, it is required that you set and
match the corresponding EFI variables.
PA-RISC systems. There is only one area where granularity values are set: the vPars
database.
For PA-RISC, there are no granularity values in
the PA-RISC firmware. The memory is divided into the granules by the
vPars Monitor itself. Note that this means the update firmware option
([:y]) of vparcreate is ignored
on PA-RISC.
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