Although Webserver Stress Tool runs on all 32bit Windows versions (Win95, 98, ME, XP, 2000, NT, 2003) it is strongly recommended to run it on a Windows NT machine (XP, 2000, NT, 2003) because of the much more reliable IP stack.
Why: Win9x/ME have a built in limitation of 100 simultaneous socket connections. This limits the number of simulated surfers you can employ when running a Webserver Stress Test.. You can try to change the registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCP\MaxConnections to the value 256 (if entry doesn't exist, you have to create it), but that doesn’t always help.
“Post-NT” Windows versions also offers a much more reliable and powerful multithreading architecture that Webserver Stress Tool utilizes when performing simulated user testing.
Please also refer to the Performance Tips&Tricks Section!
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