One reason for slow performance in SharePoint (authPersistNonNTLM)

  When discussing possible causes for sluggish performance in SharePoint farms, there is one provocative KB article that has helped many people out:  954873   – You may experience slow performance when you use Integrated Windows authentication together with the Kerberos authentication protocol in IIS 7.0http://support.microsoft.com/kb/954873/EN-US The idea there, in short, is that when an IIS setting named AuthPersistNonNTLM is…

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IIS7.x: Webdav Troubleshooting

When you’re troubleshooting webdav problems in IIS 7.0 and think that everything should be working (but its not), consider uninstalling webdav completely, rebooting, downloading the most current installer package from http://www.iis.net/download/webdav (even if you think you already have the latest bits), and reinstalling webdav.  This isn’t the answer to every webdav problem but it seems to me…

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IIS7.x: A Common Mistake when reinstalling IIS 7.x – errors 0x80070490 and 0x80070002

Problem and Symptoms: There is a trick to reinstalling IIS7x that is not well known.  For those familiar with IIS 6.0, it is natural to try to uninstall IIS 7.0 (or 7.5), reboot, and expect it to reinstall fine.  If it doesn’t, it is somewhat natural, thinking still in terms of IIS 6.0 here, to…

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IIS compression overwrites the VARY: header

Symptoms IIS compression overwrites the VARY header. If for example an ASP.NET Web Service adds the HTTP header “Vary: Accept-Language, Accept-Encoding” to every response, it may work fine until IIS compression is enabled.  The vary header may still contain: “Vary: Accept-Encoding” but it no longer in this example contains the “Vary: Accept-Language, Accept-Encoding” that the…

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"Page cannot be displayed" due to Non-Paged Pooled Memory Depletion

     Overview   It’s not unnatural to assume an IIS process hang when web client browsers begin reporting either “Page cannot be displayed . . . cannot find server or dns error” (IE6) or “Internet Explorer cannot display the webpage. . .”  (IE7).  But when an IISRESET proves insufficient to provide temporary relief, it…

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