I am deploying DC’s on Hyper-V. I asked for 1.5 times the DIT size for dedicated memory allocation. I was given 2 gb startup with up to 6gb dynamic and was told this is best practice on Hyper-V. There are some articles out there that seem to support this notion, like here: http://www.altaro.com/hyper-v/virtualized-domain-controllers-4-myths-12-best-practices/, but I figure they are written by Hyper-V admins and not Directory Service Admins.
So I am asking if this method of memory allocation for a Domain Controller is truly best practice and if the Domain Controller will be OK with dynamic memory.