Pathway/XM System Management Manual

Configuring the Pathway/XM Environment
Compaq NonStop™ Pathway/XM System Management Manual—426761-001
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Defining the Well-Known Named PATHMON Process
Expand node (SYSTEM value) defined in the set of client NODE objects in your
configuration.
The client NODE objects used for PATHMON processes can be the same as those used
for TCPs or can be a separate client NODE object used just for PATHMON processes.
Defining the Well-Known Named PATHMON Process
In the Pathway/XM environment, the PXMCOM process starts the PATHMON
processes, creating additional PATHMON processes in designated processors as needed.
By default, PXMCOM assigns internal names to all the PATHMON processes it creates.
However, you can optionally define a name for the first PATHMON process created, by
using the PROCESS attribute of the SET PATHMON statement. Using the PROCESS
attribute allows you to define a name that can be referenced by Pathsend procedure calls
in Pathsend requesters.
For example, the following statement sets the name of the first PATHMON process in
the Pathway/XM environment to $PSEND:
SET PATHMON PROCESS $PSEND
If you use the PROCESS attribute to define a well-known named PATHMON process,
this process handles all Pathsend requests to servers in the Pathway/XM environment.
The well-known named PATHMON process, or the first PATHMON process created if
you do not define a named PATHMON process, also manages all direct server classes.
Requesting Error Dumping
You can request error dumping either by specifying the DUMP ON parameter of the
SET PATHMON statement in your configuration or by issuing the PXMCOM
CONTROL PATHMON, DUMP ON command at run time.
•
Use the SET PATHMON statement if you want to configure your PATHMON
processes to provide an error dump automatically.
•
Use the CONTROL PATHMON command in PXMCOM if you have not
configured error dumping, but you want to request it after you have already started
your Pathway/XM environment.
If you have used one of these and an internal or fatal error occurs, the affected
PATHMON process generates an error dump of the information in its data stack and
writes it to a file. The dump file is an internally named file that resides on the same
volume and subvolume as the PATHCTL configuration file for that PATHMON
process.
If you request your Compaq representative’s help in analyzing a problem, the
representative will likely require a dump file. It is therefore recommended that you
always set DUMP to ON for production systems.