NET/MASTER RMS Management and Operations Guide

Operational Considerations
Planning for, Installing, and Managing RMS
115415 NonStop NET/MASTER RMS Management and Operations Guide 3–27
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 processes
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
Note As a general rule, the DSNM set of processes should have higher priority than any process that has a
message handler which sends commands to the DSNM components.
As a general rule, configure the EMS consumer distributor process between EM
processes and IS and MS processes. See the NonStop NET/MASTER MS System
Management Guide 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.
Setting the SYSPARMS
NCLUMAX Parameter
In large systems, the recovery of subjects can result in a large number of NCL
procedures running simultaneously, possibly exceeding the SYSPARMS NCLUMAX
parameter. The SYSPARMS NCLUMAX parameter determines the maximum number
of NCL processes that a user can execute concurrently in a region. If the SYSPARMS
NCLUMAX parameter is exceeded, RMS cannot act upon some events; consequently,
some subjects are not recovered.
To avoid this situation, you should monitor and evaluate your NonStop
NET/MASTER MS system to determine a suitable value for the SYSPARMS
NCLUMAX parameter.
You should consider increasing the value of the SYSPARMS NCLUMAX so that it is
greater than the sum of the following:
The potential number of subjects to be recovered
The number of concurrent NCL processes