Hyper-V Memory Usage physical or disk?

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i have 2 node server 2008 r2 hyper-v cluster.this cluster has 2 100gig luns attached have been configured csv. have 2 highly available vms running.

i under impression hyper-v uses physical memory , not using virtual memory. say, have 2 beefy hosts has 256gigs of ram each.

i have set vm use 65gigs of ram. have 1 drive on vm 50gig drive, 20.3gigs free.


when vm off, lun shows 66% free space, when turn vm on lun shows 15% free space.

 

so vm using lun memory or missing something?

when vm powered on there placeholder file created on file system equal size of ram of vm.

this file ensure there enough physical space reserved save memory state of vm , vm goes svaed state.

if vm goes saved state file replaced memory of vm.

there no way modify behvior in way, other reducing ram of vm - file decreases in size accordingly.

this not used memory paging or - strictly placeholder , failsafe.

 

brian ehlert (hopefully have found useful) http://itproctology.blogspot.com


Windows Server  >  Hyper-V



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