TN3270 performance testing guidelines
Limitations
You can use this extension to test applications that run on a TN3270 terminal emulation client, where the test simulates multiple terminals that connect to one or several servers.
- IBM® Personal Communications
- Attachmate EXTRA! X-treme
Performance
When deploying your performance tests, use a relevant number of virtual users on a given computer. For example, if you deploy too many virtual users on a single computer, the results reflect more the load of the test computer than the load of the server.
For best results with performance tests on an average test computer with a 1 GHz processor and 1 GB of RAM, do not exceed 1000 concurrent virtual users.
If you exceed the number of virtual users that a single test computer can run, the measured performance of the server is affected by the performance of the test computer, which invalidates the final results.
- In the schedule editor, reduce the Test log level setting to None.
- In the schedule editor, set the Statistics sample interval value to approximately 1/60 of the run time, for example 12 minutes for an estimated 12-hour session.
- When possible, use loops inside test suites rather than loops in the schedule. Using loops inside test suites avoids connection problems that might occur over long-duration tests and emphasizes measurement of the send and receive activity rather than connection and close activity.