Does anyone know why I am getting thousands of calls to FileOpenOrCreate looking for random .cshtml and .vbhtml files using PerfView and the Processes / Files / Registry stacks section of a collection?
PerfView showing thousands of random FileOpenOrCreate during thread exhaustion
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If you spend just a little bit time on the source code (but not obvious how to locate the source files), you can see ASP.NET runtime (
WebPageRoute) is trying to map request path to file system path,https://github.com/aspnet/AspNetWebStack/blob/42991b3d2537b702736463f76a10a4fcf2ea44c9/src/System.Web.WebPages/WebPageRoute.cs#L35
In that process it utilizes a cache in
MapPathBasedVirtualPathProvider,https://referencesource.microsoft.com/#System.Web/Hosting/MapPathBasedVirtualPathProvider.cs,78
The file system access recorded by PerfView matches the behavior of building up such a cache, so there doesn't seem to be anything wrong there.