This graph shows the average time a user waited for his request to be processed (including redirects, images, frames etc., if enabled), the hits per second and the users per clicks. The difference to the graph above is that this time the values are calculated for all URLs together.
The following graph shows the results of the same test as in the previous section:

We can see that with more than 500 users the two lines for “clicks per second” (blue) and “hits per second” (green) differ more and more. The reason is that hits includes requests that produce errors, but clicks are only calculated from the requests that were successful.
Webserver Stress Tool is a powerful HTTP-client/server test application designed to pinpoint critical performance issues in your web site or web server that may prevent optimal experience for your site's visitors.
Welcome
Introduction: Testing Basics
Performance, Load or Stress Testing?
Calculation of Load and Load Pattern
Webserver Stress Tool Features
How much load can Webserver Stress Tool generate?
Installation
Configuring Webserver Stress Tool
Selecting the Test Type and the Number of Users
Selecting the URLs or Editing the URL Script
Using Custom URL Scripts for Advanced URL Sequences
Performance Tips&Tricks
Running the Test
Reviewing Logfile Results
Analyzing Graphical Results
Graph Click Times & Errors (per URL)
Graph Click Times, Hits/s and Clicks/s
Graph Server and User Bandwidth
Creating Reports
Additional Features
Appendix
Software License and Contact Information