268 IBM Application Development Tools for z/OS and OS/390
Performance test includes measurements, changing parameters and then taking
measurements again and answers the question, “How well can it be done to
work?” WSim can be used to report terminal response times and it also provides
the possibility to create controlled, repeatable transaction load for the system
under test.
Stress test tries to find problems in interactions and resource contentions by
loading the system under test with extremely high transaction rates and answers
the question, “What will break first?” This type of test is almost impossible to
conduct on online systems without a special tool. WSim can generate controlled
message traffic at controlled rates.
Capacity planning ...