NOTE: Note that each memory record must be preceded by the #! characters. These lines are not treated as comments.

A white paper, titled HP Process Resource Manager memory resource groups: Memory calculation, on the web at http://h20338.www2.hp.com/hpux11i/downloads/5983-1676EN.pdf presents a case study of setting memory allocations for PRM groups.

Use the following syntax to specify a memory record:

#!PRM_MEM:{PRMIDGROUP}:SHARES:[MAX]:::[[IMPORT]:[EXPORT]:]

where

 

#!PRM_MEMIndicates the start of a memory record.
PRMID GROUPIs a PRM group ID or group name that corresponds to an existing group.

 

When specifying parents in a group hierarchy, use their names.

SHARES

Specifies the group’s guaranteed proportion of available memory. Shares

 

are integer values ranging from one to MAXINT.

MAX

(Optional) Specifies a cap (upper bound) for memory consumption for any

 

non-HIERPRM group. This integer value represents a percentage and must

 

be greater than or equal to the percentage determined by the group’s

 

number of memory shares. There is no requirement that the max values

 

total 100%.
IMPORT, EXPORT

Allow a PRM group to borrow or lend memory resources. Leave both fields

 

blank to allow unrestricted borrowing and lending. (Leaving the fields blank

 

enables the proportional overachievement feature.) Assign both fields a

 

value of 0 to isolate a memory-critical group to ensure it gets exactly the

 

memory you give it.

 

You cannot set EXPORT to 0 for the OTHERS group.

NOTE: If you add memory records to the PRM configuration file, your configuration file must not contain a PRM_SYS (PRMID 0) group. If the group is already present, delete it.

Consider the following example memory records:

# PRM memory records

#!PRM_MEM:1:10:25::: #!PRM_MEM:databases:30:::: #!PRM_MEM:databases/inventory:15:::: #!PRM_MEM:3:15:::: #!PRM_MEM:4:55:::: #!PRM_MEM:5:5:15::: #!PRM_MEM:6:20::::0:0:

The example shows:

•A memory record for PRMID 1 (group OTHERS), which specifies 10 memory shares. The memory cap is 25%.

•The parent group databases starts a hierarchy and is granted 30 memory shares to be divided by its child groups.

•A memory record for the databases/inventory group. Rather than using its name, we could have used its PRMID, which is 2, as we see from the example in the section “Group/CPU record syntax” (page 55). This record specifies 15 memory shares. No memory cap is set.

•A memory record for PRMID 3. We could have used the group’s name, databases/order, in place of the PRMID. This record specifies 15 memory shares. No memory cap is set.

•A memory record for PRMID 4, which grants 55 memory shares. No memory cap is set.

60 Configuring and enabling PRM on the command line