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IIS6 slow serving up images

I’m having a strange problem with one of our IIS6 servers – it is dead slow delivering images to the browser.

I have a very simple static HTML page, with a couple of images. (60kb all in). Server is a P4, 1GB RAM, Windows 2003 Server, .NET 1.1

From the machine, I open the page via the filesystem (i.e. C:\Inetpub\wwwroot\sccstatic.htm). Instantanious (browser caching turned off), as expected.

Again from machine, open same page via IIS6 (i.e. http://localhost/sccstatic.htm). Text loads instantaneously. But the images really trickle; 10 seconds in total; each image loading one at a time.

This can’t be right! (Same page on different server, instantaneous). Something must be configured incorrectly!

However, I’m not even sure where to start looking for the problem. Can anyone point me in the right direction?

mr_davidlaing

ASKER

Woohooo! Solved.

It was an ISAPI filter – bloody Coldfusion that I thought had been uninstalled was still lurking, insisting on being involved in rendering the images.

Removed the IIS filter; images delivered at lightning speed.

Further reading here: http://www.microsoft.com/technet/prodtechnol/windowsserver2003/technologies/webapp/iis/iis6perf.mspx#EEAA

mr_davidlaing

ASKER

Guess the first person who says "I told you so" gets the points :)

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nihlcat

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mr_davidlaing

ASKER

Not at all - living by the multiplier principal of point giving; I'll give them to nihlcat.