HP Process Resource Manager User's Guide

Configuring and enabling PRM on the command line
Configuring PRM
Chapter 7102
The generic configuration file contains:
• A PRM group/CPU record for the user default group, OTHERS
(PRMID 1) and 100 CPU shares.
• A PRM user record for each user specified in the /etc/passwd file.
Root users are assigned to the group PRM_SYS. For each nonroot user,
instead of placing the user in a PRM group, a record is created using
the placeholder (NONE). The typical PRM placement rules then apply
to the processes owned by the given user. (For information on the
placement rules, see “Precedence of PRM group assignments” on
page 65.)
• On HP-UX 11i v2 (B.11.23) and later, a PRM compartment record for
each active secure compartment. Instead of mapping the
compartment to a PRM group, each record uses the placeholder
(NONE). (You create secure compartments using the HP-UX feature
Security Containment. You can also create secure compartment
configurations using a PRM utility such as srpgen or prm2scomp.)
• A PRM Unix group record for each Unix group defined on the system.
Instead of mapping the Unix group to a PRM group, each record uses
the placeholder (NONE).
If you add or modify users in /etc/passwd after installing PRM, execute
prmloadconf to add new PRM user records to your configuration file for
the new or modified /etc/passwd entries. These new PRM user records
are created with the placeholder (NONE) instead of a PRM group.
Compartment records and Unix group records are also created.
prmloadconf retains any customization you have made to an existing
configuration file.
Configuration tips and requirements
When altering a PRM configuration, keep in mind:
• Assigning memory shares to groups is optional. However, if do you
assign memory shares, you must assign them to all PRM groups. You
cannot assign memory shares in a configuration with PRM_SYS
explicitly defined.
• Disk bandwidth is assigned per logical volume group (LVM) or per
disk group (VxVM). You can assign an FSS PRM group different disk
bandwidth shares for each logical volume group/disk group.
Assigning disk bandwidth shares to groups is optional. However, if