CT-PT: Certified Tester Performance Testing

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QuestionQ20

Performance Testing Tasks

You are overseeing the testing work for an existing distributed system that manages inventories of automobile and light-truck tires from multiple warehouses throughout the country. The system is being enhanced to record incoming restocking shipments at the warehouse point of entry and outbound sales shipments at the warehouse point of shipment; all processing occurs in real time. System demand has traditionally peaked on Mondays because of accumulated demand from the preceding weekend.

You have validated the test objectives with every stakeholder. You have also created and verified an operational profile that models entities submitting large bulk orders of 1600 tires or more per transaction. You have likewise verified and created this profile for peak processing at an average rate of 25 transactions per hour from 1:00pm to 4:00pm daily, and an average of 10 transactions during non-peak hours.

How should this load profile be constructed?

Explanation

A load profile specifies the activity experienced by the system over a defined period and should model the aggregate transaction workload. The peak operational profile requires a constant rate of 25 transactions per hour for the three-hour period from 1:00pm to 4:00pm, so it is represented by one aggregate system graph rather than separate server graphs.

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