VMWare ESX Performance Report
Tuesday, 12 September 2006 by Michel Roth
On Phil Windley's blog, there's an entry about a 32 page rapport he wrote about using VMware ESX in CPU intensive setups. There's some interesting conclusions he drew:

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.

Read the entire report here. (pdf)

Related Items:

CPU limits for ESX 2.x and 3.0 (12 May 2006)
ESX Server 3.0 and VirtualCenter 2.0 Available For Download (16 June 2006)
VMWare Performance Tips And Tricks Paper (10 February 2005)
Overview Of VMWare DRS - Distributed Resource Scheduler (27 June 2006)
The Single Most Important Virtual Machine Performance Tip (31 October 2006)
FastScale Virtual Manager 1.0 (31 August 2007)
Virtual Machines Slow After Using Virtual Machine Importer? (8 November 2006)
VMMs Versus Hypervisors (11 July 2006)
Offline Virtual Machine Servicing Tool Beta (13 May 2008)
Staging A Disaster Recovery VM (3 January 2007)
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