HP Process Resource Manager User's Guide

Overview
Why use HP Process Resource Manager?
Chapter 126
Table 1-1 Resources managed by PRM
Resource
managed
Shares Cap Management algorithm
CPU Yes (for FSS
PRM groups)
Yes
(on all
groups in
CPUCAPON
mode; on a
per-group
basis is also
available for
HP-UX 11i
v3 and later)
PRM allocates time slices to FSS
PRM groups proportional to their
shares. When CPUCAPON mode is
enabled, the FSS PRM group is
given CPU time regardless of
whether the time is needed. With
per-group capping, the CPU time
remains available to other PRM
groups.
For PSET PRM groups, PRM
allocates entire cores to the group
according to the current
configuration. CPU capping for
PSET PRM groups is a result of the
number of cores assigned to the
group.
Disk bandwidth Yes No PRM re-orders the volume group’s
(or disk group’s) I/O requests in the
kernel based on the PRM group
shares.
Real memory
(private)
Yes Yes
(on a
per-group
basis)
When the system is paging (real
memory is exhausted), if a PRM
group is exceeding its shares, the
Memory Resource Groups (MRG)
kernel causes the process to page.
Real memory
(shared)
N/A N/A The amount of memory requested is
set aside for use as shared memory.