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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.
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.