Wednesday, September 06, 2006

Phil Windley's Technometria | VMWare ESX Performance Report

Phil Windley, former CIO of Utah, had a student do a report on ESX server performance. He reports the following findings from the student:
  • Single CPU virtual machines scale better than virtual machines using Virtual SMP.
  • Hyper-Threading increases throughput if there are a large number of virtual CPUs, but makes no difference if the number of virtual CPUs is less than or equal to the number of physical CPUs.
  • Do not allocate excessive resources to virtual machines. Additional resources may hurt performance.


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