Tandem Capacity Model (TCM) Manual

Figure 6 System-Level Process Flow Diagram of a Sample Application
Processes in a category must not only recognize the same set of transaction types but also expend
roughly the same proportion of effort on the transaction types they recognize. For example, suppose
a requester and a server class processes T-1 and T- 2 (and no other types), and the requester
expends twice as many CPU seconds on T-1 as T-2, but the ratio in the server class is 3:1. These
process groups must be in separate categories.
When you draw your process flow diagrams:
• Use a separate set of arrows for each transaction type.
• The arrow points to a server.
• Application disk processes are lumped together.
• Ignore TMF activity.
Customizing Your Process Category Control File
You must now translate the process flow diagram into process category (PCAT) statements for
MeasTCM. A template of the Process Category Control File (CNTLFILE) is available in the MeasTCM
installation subvolume (ZMEASTCM). To define the process categories for your Measure data,
copy the template control file to your working subvolume and edit the file according to your
application needs.
Figure 7 (page 34) shows the template CNTLFILE. Each section of the template CNTLFILE is described
following the figure.
Customizing Your Process Category Control File 33