The document discusses a presentation about using LoadStorm to perform load testing on websites. It provides an overview of why load testing is important for capacity planning and performance tuning. It then demonstrates how to set up a load test in LoadStorm by creating a plan, scenarios with steps, and running the test. The presentation shows the results of load tests on a Drupal e-commerce site using Amazon EC2 and Rackspace cloud servers to simulate different levels of traffic. The tests tracked metrics like response times, errors and server resource usage to help evaluate the site's performance under load.

1. http://www.flickr.com/photos/nebraskasc
PrometSource CDMUG Using
LoadStorm

2. Objectives
-> LEARN WHEN TO LOAD TEST
-> UNDERSTAND HOW TO LOAD TEST
WITH LOAD STORM

3. About Me
• PRESENTER
• ANDY KUCHARSKI
• @AKUCHARSKI
• PROMET SOURCE
• FOUNDER
• @PROMETSOURCE

4. About Promet
• Focus on Drupal
• Founded in 2003
• Offices in the US (Chicago, San Jose)

5. http://www.flickr.com/photos/peterlozano
What Load Testing is not
Front End Performance Testing
High Availability analysis

6. Why Load Test
Capacity Planning
Capacity Testing
Performance Tuning

10. www.LoadStorm.com allows you to quickly and
easily remove create a test load hitting your site from
Amazon and Azure cloud servers

11. The Victim – Drupal 6 Ubercart site

12. The Victim - 44 objects on home page

13. How to Set up a load test - Step 1 – create a Plan
Plan is a collection of Scripts, steps and data about the tests its always the first
step and it’s the highest level

14. How to Set up a load test - Step 2 – create a Scenario
A scenario is a collection of test steps (user actions, like a click or a form submit).
Weighing (if you have more than one scenario) min/max pause and form data
set

15. How to Set up a load test - Step 2 – create a Step (and repeat)
Steps are user actions. Load storm allows for links, new pages, random clicks,
static data and form data (for required unique values)

16. How to Set up a load test - Step 3 – create a Step (and repeat)
Steps are user actions. Load storm allows for links, new pages, random clicks,
static data and form data (for required unique values)

17. Two scenarios, main one will register a user in four steps

18. The Servers – Amazon EC2 Small and Medium VS RS Cloud 2G and 4G

19. EC2 Small: Peeked at 75
users
• User Load and Requests
per second
• Average Response time
• Peak Response time
• Error rate %
20 to 115 users in 40 minutes

20. Result: RS peeked at 65
users
• User Load and Requests
per second
• Average Response time
• Peak Response time
• Error rate %
20 to 115 users in 40 minutes

22. While running load tests, what’s happening on the server? Apache is consuming all
resources, its actually not the database.

23. Result: EC2 Medium
Peeks at 75 users again
Random Server Fail
– test needs to be
restarted
20 to 115 users in 40 minutes

24. Result: EC2 Medium
Peeks at 75 users again
• User Load and Requests
per second
• Average Response time
• Peak Response time
• Error rate %
20 to 115 users in 40 minutes

25. Result: RS 2G, keeps
going at 115
• User Load and Requests
per second
• Average Response time
• Peak Response time
• Error rate %
20 to 115 users in 40 minutes

27. While running load tests, what’s happening on the server? Apache is consuming all
resources, its actually not the database.

29. Questions?
andy@promethost.com
@akucharski
@prometsource