I have a Windows Server 2008 R2 Hyper-V guest (the host is Windows Server 2016) which sometimes (for example, right now) fails to get more memory even though

  1. dynamic memory is enabled,
  2. plenty of memory is available on the host, and
  3. the guest requires more memory.

Ad 1:

guest config

Ad 2:

host memory

Ad 3:

guest memory pressure

As soon as I manually restart the guest, dynamic memory allocation works properly again (until it stops working properly again).

I have found the following similar questions and resources, but they only apply to other operating system versions:

Is this a known issue? If yes, what can I do to fix it?

Note: Since the problem only occurs sporadically, I won't be able to give timely feedback on "Try this: ..." answers.

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