Tandem Capacity Model (TCM) Manual

Figure 29 Workload Apportionment Screen
Notice that the batch transaction, CustUpdt, is labeled as B. The online transactions, Withdrawal
and Deposit, are labeled as X.
Number of Tasks
In your batch transaction, you can have multiple tasks. In the Mighty Manufacturing example
earlier, the Shipping Orders batch workload has two tasks. If your transaction has multiple tasks,
you need to modify the #Tasks field for the batch transaction in the Workload Apportionment
screen:
1. Open a WA model.
2. Log on as an administrator or super user. For more information about this step, see “Changing
Authorization Levels” (page 69).
3. Move to a Workload Apportionment screen.
4. Choose the Unprotect Admin Fields option from the Options tab. TCM highlights the fields that
you can modify.
5. In the #Tasks field for your batch transaction enter the correct number of tasks in your batch
transaction and press Return. To finish entering your data, you must press Return before
selecting Calculate Now or pressing a function key.
6. Select Options > Protect Admin Fields.
7. Select Options > Calculate Now to update the table. TCM recalculates values based on your
changes.
8. If you want to save the file, select Save or Save As from the File tab.
Workload Detail by Category
The Workload Detail by Category screen in the WA model has one field that pertains to batch
transactions: tunable CPU.
You can change this field from its default value either in the Apportionments Weights or Transaction
Count screen of the WA model or in the Actual or Plan Detail Baseline by Category screens in the
Performance model. It is recommended that you use the Performance model screens to modify these
fields if needed. For more information on CPU tunability, see “CPU Tunability” (page 102).
Creating a Performance Model
You need to evaluate three batch parameters in the Performance model and decide whether to
change them from their default values. These batch parameters are:
• Number of batch CPUs
• Hardware utilization thresholds for CPU and disk
100 Modeling Batch Workloads