I'm looking to get trained on performance testing (for Web applications).
However, most courses that I've come accross researching online are very focussed around proprietry tools (Loadrunner).
Does anyone have recommendations for a course that's tool agnostic (or uses opensource tools like jmeter)? I'm looking for courses that teaches me concepts of performance testing rather than how to use a specific tool.
Wow nothing that I can think of, offhand. I mean, I would definitely read some of the posts here in order to get an idea as to what some of the elements of Performance testing are.
Have you tried LogiGear?
If you want specific questions answered, this is a good place to ask questions. But you should definitely start from asking from a perspective of understanding what you don't know (meaning you've tried some things and have specific questions).
If you can make it to Toronto, I teach a public tool-agnostic, context-aware performance testing course there a couple of times a year. The majority of the material is about planning tests, modelling workload, designing and running test scenarios, and analysis. While I use an open source tool for examples, I stress in my material that a tool is not a testing strategy.
If you have a few people down there that want a course, it could be arranged. I'd definitely enjoy the trip.
If I don't see you, I still wish the best of luck to you, we can always use more bright performance testers. The fact that you figured out that it isn't about tooling suggests that you will do very well.