1. Load Testing &
Apache JMeter
Chuck Hill
Global Village Consulting, Inc.
WOWODC 2010

2. What, Why, How?
• Why?
• What?
• When?
• Where?
• How?

3. Planning for Load Testing
• Time
• Tools
• Equipment
• Information
• Lots of data

4. JMeter Components

5. HTTP Cookie Manager

6. HTTP Request Defaults

7. Thread Group

8. Sampler

9. Listeners

10. Timers

11. Assertions

12. Test Parameterization
• Parameterize for
• different environments
• different scenarios
• different data
• Start Early!

13. Parameters on Test Plan

14. Thread Group Parameters

15. Thread Group
Specific Parameters

16. Complications of WOe
• URL is recorded in Sampler so...
‣ Session ID and Instance Number
➡HTTP Cookie Manager
‣ Context ID
➡A problem, but only in loops

17. Session ID and
Instance Number

18. Use Matches in URL

19. Find Context ID

20. Use Context ID

21. Recording Tests
• Record and refine
• Use Selenium for repeatability
• Run tests slowly

22. Recording Problems
• ERXSwitchComponent
-Der.extensions.WOSwitchComponent.patch=false
• Copy and Paste to Test Plan

23. Delays for Reality
• Pause for realistic results
• Constant Timer
• Gaussion Random Timer
• Uniform Random Timer
• Combinations of Timers

24. Ajax!
• The good news...
• The bad news...
• XPath Extractor
• JavaScript
• AjaxUpdateContainer and friends

25. Data Driven Tests

26. Upload Problem

27. Running the Tests
• Run from GUI
• Run from command line / script
• Run from multiple machines

28. Evaluating Test Results
• JMeter Reporters (Listeners)
• response times: min, max, avg, std dev
• error count
• ActivityMonitor.app & ServerAdmin.app
• memory, CPU, network
• JavaMonitor
• Transaction Average, Average Idle Period

29. Summary Report

30. Creating Effective Tests
• Work as super-user
• Use Selenium tests as base
• Run against known DB backup
• Parameterize tests
• Use assertions

31. Creating Readable Tests

32. Q&A
Load Testing and Apache JMeter
Chuck Hill
Global Village Consulting