Before you can test the performance
of TN3270 terminal applications, set up your test environment and
incorporate these guidelines to produce reliable performance tests.
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.
These TN3270 terminal emulation
packages are supported:
- 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.
When editing a schedule for long performance tests, use these
recommendations:
- 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.