Tandem Capacity Model (TCM) Manual

The table is used to indicate how the CPU and disk seconds consumed by these categories
are to be allocated to each transaction.
4. Type—Not Directly Modifiable
Type is the type of a process category, as defined in MeasTCM on the NonStop host system.
The category type consists of one of the following characters:
Server processS
Requester processR
Disk process (including all nonaudited disk processes)D
TMF processes (including all audit disk processes)T
Line handler processL
OtherO
Fixed (system overhead that does not vary with throughput)F
Ignore these categories (appropriate interrupt and disk activity to be omitted)Z
5. Tunable CPU—Not Directly Modifiable
Tunable CPU applies to batch transactions only. Y indicates that batch transactions are spread
evenly across all available batch CPUs. N indicates that batch transactions are assigned to
run in only one CPU.
6. Fixed CPU Sec—Not Directly Modifiable
The total number of CPU seconds consumed per second by process categories of type F (fixed).
This number is not included in the CPU and disk consumption of individual transactions, but
does affect the total CPU and disk utilizations. A category should be defined as type F if its
CPU and disk consumption do not increase as throughput increases, such as during
asynchronous data communications polling activity or the running of Measure.
7. Priority—Not Directly Modifiable
Priority is the priority of the process category.
8. CPU Seconds Per Transaction—Not Directly Modifiable
CPU Seconds Per Transaction are the CPU seconds allocated to each transaction by process
category.
9. Not shown. CPU Sec and DP CPU Sec Tables—Not Directly Modifiable
The CPU Sec and DP CPU Sec tables are visible only when you select the Display Scratch
Areas option. The values in these tables are the CPU seconds and DP CPU seconds allocated
to each transaction by the process category. Total CPU seconds per transaction is the sum of
the corresponding values in these two tables.
Plan Baseline Detail by Category Screen
The Plan Baseline Detail by Category screen is used to view or modify detailed characteristics
about process categories.
You can view the Detail CPU seconds in the units of the Actual CPU in the Consumption Model or
scaled to reflect the Plan CPU in the Consumption Model. To use this feature, select the appropriate
button and then select Calculate Now (F9). Figure 51 (page 156) shows a sample Plan Baseline
Detail by Category screen.
Plan Baseline Detail by Category Screen 155