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Multiple standard instances on 32 core AWS machine

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Hi,I have four SQL instances (currently Enterprise) which I want to downgrade to Standard edition.I can have couple of days downtime for the server, so I will be doing uninstall Enterpise, install Standard approach.I want to avoid having to split them into two 16 core machines (due to standard edition only supporting 16 cores).I want to maximize the 32 core CPU power, so if any one of the instances spikes, it can use up to 16 cores.What would be better: setup CPU affinity for each instance to have 16 cores. They will overlap as there are four instances.or, just leave it up to the windows to distribute the CPU power to each instance?I have SQL Server 2014 and Windows Server 2012.Thanks.

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