We host a rather large (self written) ASP.NET website for our customers. It consists of a web service, a web site and a image serving web site, all three in their own virtua
I had the same problem with a Virtual Machine when we upgraded memory size from 4Gb to 8Gb (ironically). I found this blog which explains we can use "private memory limit" but not "virtual memory limit" with 64bit system, because : "If you are on a 64bit platform (and I am), ASP.NET app's aggressively reserve virtual memory".
http://blog.walteralmeida.com/2011/07/iis7-private-memory-limit-versus-virtual-memory-limit.html