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VMWare ESX Performance Report
I’ve had a student, Terry Wilcox, working to understand the performance characteristics of VMWare’s ESX virtualization monitor. Terry’s finished his initial work and written up the tests and some conclusions. Overall, ESX scales quite linearly—that is each new virtual machine gets a fair share of the processor and other resources. There are some interesting conclusions:
- 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.
If you’re interested in the details of how the tests were done and these results, the full report is available (PDF).
Posted by windley on September 6, 2006 10:55 AM
Comment from Alex Weeks at September 11, 2006 9:19 PM
Interesting Report!
Comment from software reviews at March 12, 2007 7:18 AM
Great plugin! One thought: It would be really nice to be able to use ERB from within Selenese. This way, I could look up site configuration variables and use them in test cases, eliminating some unnecessary duplication of constants.
Comment from software reviews at March 12, 2007 9:49 AM
I have the same problem as Philip. The extension worked for two days, after that it will clear the window and not display anything. I tried to uninstall mozilla, delete the profile and extensions and reinstall, but no luck :(
Comment from Jamie at September 19, 2007 6:43 AM
I haven't noticed a single percentage point of improvement from a hyperthreading CPU to a simple CPU... must be doing something wrong.
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