Microsoft Exchange Performance Counters

Microsoft Exchange Virtualization HyperV Memory counters

Counter Name	Description
Hyper-V Hypervisor [ROOT] Partition\1G GPA Pages
Hyper-V Hypervisor [ROOT] Partition\2M GPA Pages	Shows the number of 2M pages present in the GPA space of the partition. This indicates whether a VM is using large pages, which improves overall VM performance.
Hyper-V Hypervisor [ROOT] Partition\Deposited Pages	Shows the number of pages deposited into the partition. This indicates how much memory the hypervisor is using for managing the VM.
Hyper-V VM Vid Partition\Physical Pages Allocated	Shows the total number of guest pages and Virtual Infrastructure Driver (VID) pages needed to manage the VM.
Hyper-V VM Vid Partition\Remote Pages Allocated	On non-uniform memory access (NUMA)-based systems, this shows whether a VM is spanning multiple nodes.
Memory\Available Mbytes	Available megabytes (MB) is the amount of physical memory, in megabytes, immediately available for allocation to a process or for system use. This shows how much memory is remaining for guests. There is a reserve of 256 MB, 512 MB, or 2,048 bytes that the root will always leave outside of guest memory. The exact amount varies depending on the Hyper-V release. If a VM won't start, it may be because there are too few available bytes to satisfy the reserve.
Memory\Pages/sec	Pages/sec is the rate at which pages are read from or written to disk, to resolve hard page faults. This is a measure of memory pressure because it tracks hard faults. Hard faults are page faults that require disk access. Usually, the number spikes when there are too few available bytes available on the system, and processes are competing with each other for physical RAM.