Tandem Capacity Model (TCM) Manual

Category Demand Report
The Category Demand Report screen summarizes the performance data for process categories
collected on the NonStop host system. To load the data, select Create a New WA Model from the
TCM Initial menu or Load Category Data from the Update tab. The data on this screen is used as
input for the Workload Apportionment component of the model.
As Figure 35 (page 109) shows, the top portion of the screen displays summarized data for each
type of process category, such as server (S), requester (R), and disk (D) processes. The bottom
portion displays detailed performance data for each process category as defined by MeasTCM
on the NonStop host system. Figure 34 (page 107) shows a sample Category Demand Report
screen.
Figure 34 Category Demand Report Screen
Significant Rows
1. Application—Modifiable by TCM administrators only
Application is the user-defined name for the application (or set of applications) being modeled.
The application name is defined in MeasTCM on the NonStop host system but can be
overwritten by the TCM administrator if preferred.
2. Category File—Not directly modifiable
Category File is the name of the CSV file that was loaded into the WA model. This file was
created by MeasTCM on the NonStop host system and downloaded to the workstation. It has
a file extension of .CSV. If TCM detects an invalid CSV file format, an error message appears
when the Load Category Data option is selected. A CSV file is considered invalid if its first
field does not have a node name or a value of I01.
3. Interrupts—Not directly modifiable
Interrupts are the total number of interrupt seconds measured on the NonStop host system by
Measure during the time period of the sample window. These seconds are apportioned to the
CPU seconds of all the process categories according to their relative number of messages
received and sent.
Category Demand Report 107