How to test performance in a webapp?

[Garrett Smith]

What's the best approach for testing performance?
I need to load test to find bottlenecks. The type of stress I want to create is multiple threads in a webapp (something I expect).
How can I monitor a [simulated] heavy load?

[Marcel de Jong]

Garrett,
I am using JMeter from Apache to simulate a heavy load.
A simple but effective program to use.
Regards,
Marcel

[Garrett Smith]

I just downloaded JMeter but I found that version 1.8 requires Java 1.4. I have only 1.3.1 because Apple decided not to upgrade their version of Java.
Which version do you use? How effective are earlier versions?

[s choukse]

Hi all
I have a similar requirement from where can i down load JMeter

[Pradeep bhatt]

Hi,
I have started using JMeter but I dunno how to interpret the graph. Can anyone help.