NET/MASTER Management Services (MS) System Management Guide

PARAM Commands Used to Create a Process Definition
Configuring the Processing Environment
11–10 115414 NonStop NET/MASTER MS System Management Guide
The PROCESSPRIORITY
Operand
Use the PROCESSPRIORITY operand to set the execution priority of a process;
processes with higher numbers run first. Specify PROCESSPRIORITY as an integer
from 1 through 199.
For example, to specify a process priority of 143, include the following command in a
process definition:
PARAM PROCESSPRIORITY=143
This operand is optional for all processes. If you omit the PROCESSPRIORITY
operand, the default priority is used. The default priority of all processes (except
security exit and GMM processes) is one less than the priority of the NCP. The default
priority of GMM processes is five greater than that of the NCP. For the default startup
configuration, the default priority of the security exit process is 198.
When setting the priority of processes in the CONFIG file, Tandem recommends that
you set the relative priorities so that processes acting as servers (for example, GMM
processes) have a higher priority than processes acting as requestors (for example, BK,
EM, IS, MS, and NC processes). This is so that the server process is not overloaded
with work, and has enough CPU time to perform the work.
As a general rule, configure NonStop NET/MASTER MS processes with relative
priorities in the following order (from highest to lowest):
1. Security exit processes
2. GMM processes
3. NCP
4. BK processes
5. NC processes
6. EM processes
7. IS and MS processes
As a general rule, configure the following processes between NC processes and EM
processes with relative priorities in the following order (from highest to lowest):
1. Terminal control processes (TCPs)
2. Subsystem Control Point (SCP) processes, Pathway monitor (PATHMON)
processes
3. CIPs, SCP interface (SCPI) processes, Pathway interface (PWI) processes,
SNAX/CDF interface (CDFI) processes
4. Command server (CMDSVR) processes
As a general rule, configure the EMS consumer distributor process between EM
processes and IS and MS processes. See Section 8, “Managing Event Messages,” for
more information about the priority of the EMS consumer distributor process.
Note These are guidelines only, which may not be appropriate for your installation. Consult your Tandem
support representative for assistance in configuring process priority at your installation.