If you already have your website online, a good way to start calculating the load and load pattern is to use a good log file analyzer on the log files produced by your sebserver. Web log file analyzer tools will help you determine how many people access the site per day and per hour, what pages/scripts are used how often, etc. These logs will help you determine how many visitors and pageviews you have at specific times of the day as well as what your busiest day/time is and what pages are most popular.
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