What is the maximum amount of RAM a host can provision to a Hyper-V guest?

Solution 1:

The information is to be found in the article How Much Memory Does My Hyper-V Host Require?

The amount that Hyper-V reserves for the host, called host reserve, is calculated in the following table:

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An example taken from Microsoft:

  • You have a host with 16 GB RAM
  • The Mangement OS uses 2 GB
  • The host reserve is up to 2.5 GB
  • That leaves you with 11.5 GB RAM for VMs.