WebServer Admin
Web logs and historical traffic analysis may give you insight into the kind of traffic you can expect over time, but how can you tell what your infrastructure can really handle? To find out, you need a tool that can push your infrastructure and its application stack to the breaking point. One such tool is the free Web Capacity Analysis Tool (WCAT), a lightweight load-generation utility that plays back scripted HTTP requests against a Web server (or load-balanced server farm) while gathering performance statistics for later analysis. The latest version (6.3.1 as of this writing) is available for both x86 and x64 Windows systems(x86: iis.net/downloads/1466/ItemPermaLink.ashx ; x64: iis.net/downloads/1467/ItemPermaLink.ashx ) and has support for IPv6 networks.
- Download the WCAT tool and install.
After enabling the WCAT controller, you can run the WCAT Client to performance tests.
Open another command prompt window to start the WCAT client.
The first test has no output cache policy enabled.You can set the output caching policy in IIS Manager. Below screenshot shows no output cache policy enabled.
The second test enables User-mode policy only.The test using user-mode policy assumes you are using the file notifications option displayed in the below screenshot also shows how to enable a user-mode cache policy,
No Output cached policy enabled:
User -Mode cache policy :
Kernel -mode cache Policy
Test Results :
- The IIS 6.0 Resource Kit Tools include WCAT 5.2. To download the IIS 6.0 Resource Kit Tools, visit the following Microsoft Web site:
- Am I going to host everything in one IIS Website?
- Will I use an “existing” Website like the Default Web Site or create my own?
- Will some of the site require secure authentication using SSL?
Web Capacity Analysis Tool
STEP 1: Is it really a hang?
STEP 2: Diagnose the hang
Once you confirm the hang, the next step is to determine where its taking place.
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