With memory (and in conjuction with disk), it works slightly differently. Let me see if I can clarify. Let's suppose that the memory cache interval is set to 5 seconds (default value.) The flow would be something like: 1) Request is received by Windows server (http.sys, actually). 2) Cache miss at...

Jim The memory cache is done at the kernel level. You could have a netmon between ARR and the content server to see if you actually see the cache hit. A simpler way would be to type the following on an elevated command prompt (which will show you what's stored in kernel cache.) netsh http show cache...