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HOWTO: Maximize the Number of Concurrent Connections to IIS6

Question: I'm considering building a realtime ASP.NET application on IIS6, that'll need to support about 3,000 simultaneous users on a server, each with a keep-alive HTTP connection for "server push." The HTTP connection will need to stay open for the Read More...
Posted Wednesday, April 12, 2006 11:55 PM by Anonymous | 35 Comments

IIS6 and HTTP Server API, Part 1

Question: Hi, I've found these articles: http://support.microsoft.com/default.aspx?scid=kb;en-us;q311852 http://support.microsoft.com/default.aspx?scid=kb;en-us;q327611 First of all I've got a question. READ_RAW_DATA can be used to modify the request Read More...
Posted Friday, April 07, 2006 4:15 AM by Anonymous | 9 Comments

HTTP.SYS, IIS, and the 100 continue

Question: Hi David, "My Company" is a leading middleware provider for mobile multiplayer games. Cutsomer like Disney, THQ etc. The backend is built on .NET. We went live in the US with W2K3/IIS6 which is great. But we have a major IIS6 issue. The handsets Read More...
Posted Wednesday, April 05, 2006 12:20 AM by Anonymous | 21 Comments

Does IIS6 truncate HTTP headers at a hard-coded limit?

Question: Using IIS the HTTP_ACCEPT header server variable received from the client appears to have a hard coded limit of 259 characters. This is causing problems when using a Windows Mobile 5 Smartphone which has a longer string than 259 characters which Read More...
Posted Friday, February 10, 2006 10:50 PM by Anonymous | 12 Comments

HOWTO: Measure Effectiveness of the HTTP.SYS Kernel Mode Response Cache with IIS 6

Hmm... ever since I wrote the referenced blog entry about HTTP.SYS Kernel Response cache and IIS 6.0, I have gotten questions about one thing that I forgot to mention - how to determine the effectiveness of the Kernel Response Cache. Here goes... Question: Read More...
Posted Monday, January 02, 2006 11:03 PM by Anonymous | 0 Comments

Kernel Caching in IIS 6 (Redux)

Hmm, I got the following question today, and since I had a blog entry that exactly answered the question already, it made me wonder about the visibility of my blog entries to searching... Question: Hi David, I am sure you have a ton of requests for content Read More...
Posted Tuesday, October 11, 2005 9:13 PM by Anonymous | 2 Comments

HOWTO: Diagnose IIS6 failing to accept connections due to Connections_Refused

Recently, I have seen a bunch of questions asking: "IIS6 runs fine for X amount of time [where X varies from days to weeks] and then all of a sudden, it stops accepting all connections. If I restart/reboot the server, then it is fine again... until X Read More...
Posted Wednesday, September 21, 2005 11:55 PM by Anonymous | 94 Comments

Controlling network packet size from IIS/ASP.Net?

I got this question about response packet size control... Question: Running a web app - native .NET. 2003 for server. Reports come out as garhugic (66K) packets in testing. Is there a way to control max packet size from within .NET at the program level Read More...
Posted Friday, July 29, 2005 11:46 PM by Anonymous | 2 Comments
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HOWTO: Use the HTTP.SYS Kernel Mode Response Cache with IIS 6

Motivation One of the bigger buzz-word features of IIS 6.0 on Windows Server 2003 is the "HTTP.SYS Kernel Mode Response Cache". When you do a search against "HTTP.SYS Kernel Response Cache IIS 6", you will inevitably find a large body of literature repeatedly Read More...
Posted Thursday, July 07, 2005 11:58 PM by Anonymous | 32 Comments

HTTP.SYS rejection of request lines not terminated by CRLF

HTTP.SYS allows looser HTTP parsing in WS03SP1. Read More...
Posted Wednesday, April 20, 2005 7:35 PM by Anonymous | 7 Comments
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