HP-UX 11i Release Notes (December 2000)

HP-UX 11i Operating Environments

HP-UX 11i Enterprise Operating Environment (new)

Chapter 4 91

PRM provides a shares model of distributing resources instead of static

percentages. This model facilitates conﬁguration changes. PRM groups

can be nested, allowing for more convenient partitioning.

Memory is controlled in the kernel, through the prm2d daemon, rather

than in user space, through the prm0d daemon.

The syntax for memory records is essentially the same. The only

difference being that the optional SUPPRESS ﬁeld is no longer needed and

is ignored if present:

#!PRM_MEM:{PRMID|GROUP}:SHARES:[CAP]:::

Also, the CAP value is treated as a hard limit to the group’s memory

usage. Previously, it was a soft limit that could be crossed.

The prm2d in-kernel memory manager is the default for HP-UX 11i. If

you prefer to use the previous manager (prm0d), follow the steps below:

1. As root, go to the PRM install directory:

# cd /opt/prm/bin/

2. Make a backup of prm2d:

# mv prm2d prm2d.original

3. Create a symbolic link from prm2d to prm0d:

# ln -s prm0d prm2d

The GUI has been enhanced. PRM can be remotely managed from any

system with Java Runtime Environment 1.2.2 installed. PRM has a

SNMP agent that makes conﬁguration and resource information

available.

NOTE Process Resource Manager and HP-UX Workload Manager (see “HP-UX

11i Mission Critical Operating Environment (new)”) both make use of

the PRM API. Consequently, only one of the products should be used at a

time.

Installation Requirements

Process Resource Manager (PRM) requires a minimum of 9MB of disk

space, and 2MB of memory.