I am running an ASP.NET 3.5 website on IIS 6 with Server 2003. Whenever I modify any of the ASPX files, any page on the site then takes about 2-3 minutes before it starts to load. Even the smallest modification causes this to happen.

Why is this?


I believe this is happening because IIS is recompiling your application's modules. You could try pre-compiling your application outside of IIS, which would prevent customer impact.

  • I am in the process of developing the site at the moment, and is not in production yet, so frequent changes are necessary. Is there any way to stop if recompiling? – StrattonL Apr 5 '10 at 20:39
  • If you stop it from recompiling, how will your changes have taken effect? – mfinni Apr 5 '10 at 20:44
  • hmm OK, so how do I find out whats taking so long to load? It's only a very basic website. – StrattonL Apr 5 '10 at 21:21
  • Do you have console access to the server? you might wanna try ProcMon or FileMon to see what files and processes are being activated. 2-3 minutes sounds tooo long for a compile of a simple site. I'd look for a network timeout, somewhere. DNS lookup, something like that. Sorry can't be more specific, it's just that 2-3 minutes doesn't smell like compilation latency, to me. – Cheeso Apr 6 '10 at 0:31
  • Yes, I have full RDP access. I've checked process explorer, and the CPU usage is usually around 5-10%, although task manager is reporting 70% or higher all the time, even though there are no processes or services which are using the processing power. Bear in mind it is a vps. I may end up just re-imaging the server. – StrattonL Apr 6 '10 at 12:35

I've seen this happen in environments that have the following conditions:

  • the application uses DLLs that are digitally signed (especially third party)
  • the server is behind a firewall, or is unable to resolve external DNS entries (such as the CRL)


  1. Open C:\Windows\Microsoft.NET\Framework\v2.0.50727\aspnet.config
  2. Add the following entry: in the section.
  3. Save it, recycle your worker process.
(if 64-bit, make sure you make the corresponding change under Framework64)

More documentation here

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