[T]he more [RAM] the merrier, at least to a certain degree. If you have too much RAM, the IIS file cache cannot use it fully. Therefore it might be good not to exceed 2GB to 3GB of RAM for a standard Web server.
Can anyone confirm or refute the claim that an IIS server can have too much RAM? If the claim is true, is it a matter of fine-tuning the configuration?
The reason I ask is because I am seeing a possible performance issue in my production vs test environments in which the test environment, even under heavy load, seems to perform better with 16GB of RAM than the production which has 64GB. I am running IIS 8 on Windows Server 2012 R2 64-bit.
(The only ServerFault question that I could find doesn't address IIS specifically.)