TS/MP Management Programming Manual (G06.24+, H06.03+)

Pathway Subsystem Control Commands
NonStop TS/MP Management Programming Manual—540082-001
8-4
CONTROL PM
•
When you cool start a Pathway subsystem (that is, when you use a pre-existing
configuration file to start a Pathway subsystem) after using the CONTROL PM
command, the PATHMON process uses the values you changed with the
CONTROL PM command.
•
When the creation of a backup process fails more than ten times, the PATHMON
process delays trying to create a backup process. The delay is 1 minute if stopped
11 times, 2 minutes if stopped 12 times, and so forth. However, the PATHMON
process does not delay creating a backup process if any of these occur:
°
The CPU in which the PATHMON primary or backup process is executing fails.
°
A SWITCH PM command is executed.
°
A CONTROL PM command is executed with a value in the ZBACKUPCPU
field.
In addition to not delaying the creation of a backup process if the preceding
conditions occur, the PATHMON process resets its internal counter. Consequently,
creation of a backup process has to fail again 10 more times before the PATHMON
process delays creating the backup process.
•
If the logging file is a terminal, restrict the activity on that terminal to avoid
interfering with the PATHMON process messages. If a logging terminal is
unavailable, the TS/MP environment may slow down and be unable to support
transaction processing.
•
EDIT files cannot be used as log files for the PATHMON process. If you attempt to
use an EDIT file for a log, the PATHMON process returns an error and fails to
open the log.
•
It is recommended that ZDUMP be set to ON for production systems. Having a
dump file available greatly enhances your ability to solve system problems, and is
a likely requirement when requesting help from your HP representative.
•
If you encounter system problems and the PATHMON process has not created a
dump because ZDUMP was set to OFF, use the PATHCOM DUMPMEMORY
option to force a dump.