Pages do not expire as expected after you change Web site content

Article ID: 319384 - View products that this article applies to.
This article was previously published under Q319384
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SYMPTOMS

If you change content on a Web site, the changes do not appear as expected. Instead, Internet Information Services (IIS) 5.0 and later versions of IIS return the old content.
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CAUSE

This can occur if HTTP compression is enabled on the Web server. Enabling HTTP compression introduces a new metabase key named HcCacheControlHeader. The default value of HcCacheControlHeader is set to max-age=86400 (that is, 86400 seconds). This means that the Web site stays in the cache of the browser for 24 hours.
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RESOLUTION

  1. On your server, open a command prompt.
  2. Change to your X:\InetPub\AdminScripts folder, where X is the drive that you specified for your IIS documents.
  3. Run the following command:
    CSCRIPT.EXE ADSUTIL.VBS SET W3SVC/Filters/Compression/Parameters/HcCacheControlHeader "max-age=0"

    Note In IIS 7.0, the name of the configuration key is CacheControlHeader. If the IIS 6 Management Compatability role is installed, run the command in step 3 to modify its value. Otherwise, use the Appcmd.exe tool.
  4. Stop and restart the IISAdmin service.
  5. Restart the WWW service.
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WORKAROUND

If the client refreshes the content (for example, by pressing the F5 key), the IIS cache is updated and shows the changed content.
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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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MORE INFORMATION

Setting the value of Response.Expires to 0 in the relevant ASP page does not resolve the issue.
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Properties

Article ID: 319384 - Last Review: June 26, 2008 - Revision: 4.0
APPLIES TO
  • Microsoft Internet Information Services 7.0
  • Microsoft Internet Information Services 6.0
  • Microsoft Internet Information Services 5.0
Keywords: 
kbprb KB319384
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