TS/MP 2.5 System Management Manual

If your application generates a large number of Pathsend requests (like the application shown in

Figure 17 (page 52)), you must consider distributing the request load by configuring your TDP

processes across a number of CPUs. Such an arrangement avoids overwhelming any single ACS

subsystem processes; each ACS subsystem process can handle only a certain number of Pathsend

requests. (For descriptions of configuration limits, see “Configuration Limits and Defaults” (page 318).)

Configuring a PATHMON Environment

As described in “Starting and Stopping a PATHMON Environment” (page 34) the SET PATHWAY

command allows you to define the limits for your overall configuration and to specify owner and

security attributes for your PATHMON environment. If you anticipate ever needing to migrate your

application to another node, you must consider configuring your environment for node

independence.

NOTE: For configuring the PATHMON environment in TS/MP 2.5 PATHMON environment,

PDMCOM or PATHCOM can be used. However, it is recommended to use PDMCOM (instead of

PATHCOM) because it can communicate with multiple PATHMONs simultaneously. For more

information, see the TS/MP 2.5 Release Supplement.

Specifying Limits

You must use the SET PATHWAY command to define this limits before executing a START PATHWAY

command:

MAXASSIGNS

MAXPARAMS

MAXSERVERCLASSES

MAXSERVERPROCESSES

MAXSTARTUPS

The limits that you specify determine the maximum number of SERVER objects you can define for

your system during subsequent configuration:

• MAXASSIGNS specifies the number of ASSIGN definitions that you can specify for all server

classes.

• MAXPARAMS specifies the maximum number of server classes that can have PARAM messages.

• MAXSERVERCLASSES specifies the maximum number of server-class descriptions that you can

add to the PATHMON configuration file.

• MAXSERVERPROCESSES specifies the maximum number of server processes that you can

define for all server classes using the MAXSERVERS option of the SET SERVER COMMAND.

• The total of all MAXSERVERS values for all server classes is limited to the value of

MAXSERVERPROCESSES.

You might have to first establish a value for MAXSERVERS for each server class in your

application, then adding up all the values to get an appropriate value for

MAXSERVERPROCESSES. For information on determining a value for MAXSERVERS, see

“Configuring Links for Optimum Performance” (page 66).

• MAXSTARTUPS specifies the maximum number of server classes that can have startup messages.

• In addition to the required limits, you can specify limits for other attributes. For other attributes,

if you do not specify a limit, a default is assigned. Some of the optional attributes are:

◦ MAXLINKMONS specifies the maximum number of link manager (LINKMON/ACS

subsystem) processes that can communicate with the PATHMON process at the same

time.

◦ MAXPATHCOMS specifies the maximum number of PATHCOM processes that can run

simultaneously within a PATHMON environment.

Configuring a PATHMON Environment 53