Specifications

Best Practices for Virtualizing and Managing Exchange 2013
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Figure 3: Weights and reserves in Windows Server 2012
Best Practices and Recommendations
The Weights and Reserves feature, when used properly, can be a great tuning mechanism for
Exchange 2013 virtual machines. If CPU resources are overcommitted through other additional
workloads, you can set weights and reserves to optimize the way these resources are used so that
the Exchange 2013 VMs have priority. Ideally, you should not oversubscribe CPU resources in
environments where Exchange 2013 is virtualized.
Non-Uniform Memory Access – Host Perspective
In single system bus architecture, all processors fetch memory from a single pool, and all requests for
memory are sent using a single system bus. One problem with this architecture is that as the speed and
number of processors increase, it becomes difficult for the system to handle a large number of memory
requests. This leads to issues such as memory latency and scalability limitations. While one solution for
such issues is to have larger cache size, this helps only to a certain extent. The issues related to memory
access can be best resolved with NUMA.
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