Tandem Capacity Model (TCM) Manual

Significant Columns
13. Txn Name—Modifiable by TCM Administrator
Txn Name is the name of the transactions as shown in the Workload Summary screen of the
Baseline WA model.
14. Txn per Sec (or Hour, Day, or Month)—Plan modifiable
Txn per Sec is the actual and planned transaction rates for each transaction in the model
expressed in the user-defined planning unit (transactions per second, minute, hour, day, or
month). The value in the Average Online Txn field shows the total transaction rate. If you do
not want to include a transaction in your what-if analysis, type zero (0) for the planned
transaction rate. For batch transactions, it shows the resulting throughput given the transactions
per task and the TCM calculated response time.
The Max field shows the maximum throughput achievable for each transaction, given the
planned number of devices, their constraining utilizations, and the average response time
constraint.
15. Txns per Task—Plan modifiable
Txns per Task is the number of transactions per task and applies to batch transactions only.
16. CPU Seconds—Modifiable through the Change Transaction option of the Update tab
CPU Seconds is the actual and planned consumption, or cost, per transaction in CPU seconds
(also referred to as the CPU demand) for each transaction. Fixed CPU seconds are not included
in the CPU demand for individual transactions. The value in the Average Txn field shows the
CPU demand for a weighted average OLTP transaction or the unweighted average of the
batch transaction.
Users with a TCM administrator or superuser authorization level can modify the planned CPU
seconds (by using the Change Transaction option of the Update tab) to examine the effect of
possible changes in the CPU seconds consumed by a given transaction.
Consumption Model Screen 143