Posted September 25, 200816 yr We are starting to test Windows 2008 in a virtual environment. We created an instance of 2008 on top of a VMWare server, and assigned this VM 12GB of ram for windows (no reserved amount on the host). What we're seeing is that Win 2K8 itself (in performance manager) claims it's using only 2GB of ram. However it looks like it's keeping 6GB tied up for cache. Since this is being used, on the host server instead of just 2 GB being allocated to the VM, it's allocating 8 GB of host memory. My question is, what is this cacheing in 2008, is it like the pre-fetching in Vista? And is there a way to disable it? We are much less concerned with performance improvements gained from it caching what it thinks we may want, than having plenty of available RAM for additional VMs on the host server.
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