[ovirt-users] Minimal resources for Engine

Hi there. I was reading this interesting URL someone just sent a while ago regarding hyperconvergence topic (https://www.ovirt.org/blog/2016/08/up-and-running-with-ovirt-4-0-and-glus...) and found the point about the optimal amount of resources for a Engine - 16GB of RAM. I just wanted to ask what component or feature eats up so much memory for that amount be the recommended. Or is it just in a hyperconverged scenario ? Are there any components that can be optional that can reduce the amount of memory needed to run the Engine ? Also with if the Data Warehouse runs in a separate host what would be the reduction in resources consumption, specially memory ? Thanks Fernando