HP Process Resource Manager (PRM) manual Why use HP Process Resource Manager?

prmrun	Runs an application in its assigned group or in a specified group.
prmsmhconfig	Configure or unconfigure the PRM GUI to be available in HP System
	Management Homepage (SMH).
prm2scomp	Generates a minimal Security Containment configuration based on a PRM
	configuration. (The Security Containment configuration defines secure
	compartments. You can also create compartment configurations using the
	PRM utility srpgen.)
	Available starting with HP-UX 11i v2 (B.11.23).
scomp2prm	Generates a minimal PRM configuration based on a Security Containment
	configuration. (The Security Containment configuration defines secure
	compartments.You can also create compartment configurations using a PRM
	utility such as srpgen or prm2scomp.)
	Available starting with HP-UX 11i v2 (B.11.23).
srpgen	Generates Secure Resource Partitions by creating both a minimal Security
	Containment configuration and a minimal PRM configuration based on your
	input.
	Available starting with HP-UX 11i v2 (B.11.23).

Why use HP Process Resource Manager?

The standard HP-UX CPU scheduler and memory manager allocate resources to processes based on the assumption that all processes are of equal importance. PRM, however, allows the system administrator to group processes and specify the level of importance for that group. PRM allocates CPU resources, real memory resources (private and shared) to the group based on its assigned importance.

Reasons to use PRM:

•Improve the response time for critical users and applications.

•Set and manage user expectations for performance.

•Allocate shared servers based on budgeting.

•Ensure that an application package in a Serviceguard cluster has sufficient resources on an active standby system in the event of a failover.

•Ensure that critical users or applications have sufficient CPU and memory resources.

Users who at times run critical applications, may at other times engage in relatively trivial tasks. These trivial tasks may be competing in the users’ PRM group with critical applications for available CPU and real memory resources. For this reason, it is often useful to separate applications into different PRM groups or create alternate groups for a user. You can assign a critical application its own PRM group to ensure that the application gets the needed share of resources.

•Restrict the CPU and real memory resources available to relatively low-priority users and applications during times of heavy demand.

•Monitor resource consumption by users or applications.

Assigning a group of users or applications to separate PRM groups can be a good way to keep track of the resources they are using. For information on various PRM reports, see “Monitoring PRM groups ” (page 93).

Table 1 lists the resources that PRM can manage. For more information about how a resource is managed, see “Understanding how PRM manages resources ” (page 17).

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