Important performance features in VMware virtualized environments

VMware virtualization offers many based end-to-end solutions.
The following documents deal with the performance aspects of this end-to-end solutions.

• What’s New in VMware vSphere™ 4: Performance Enhancements (New in vSphere ™ 4: Performance Optimization)
• VMware vSphere™ 4 Fault Tolerance: Architecture and Performance (VSphere ™ 4 Fault Tolerance: Architecture and Performance)
• VMware vSphere™ 4: The CPU Scheduler in VMware® ESX™ 4 (VSphere ™ 4: CPU Scheduler in VMware® ESX™ 4)
• Performance Evaluation of AMD RVI Hardware Assist (Performance evaluation of AMD RVI Hardware Assist)
• Performance Evaluation of Intel EPT Hardware Assist (Performance evaluation of Intel EPT Hardware Assist)
• DRS Performance and Best Practices (DRS Performance and Best Practices)
• Large Memory Page Performance Characteristics (Performance characteristics of large pages)
• Performance of VMware VMI (Performance of VMware VMI)
• Comparison of Storage Protocol Performance (Compare performance of storage protocols)
• What’s New in VMware Infrastructure 3: Performance Enhancements (What's New in VMware Infrastructure 3: Performance improvements)
• Fast Transparent Migration for Virtual Machines (Fast transparent migration for virtual machines)
• Fast ESX Server 2: Architecture and Performance Implications (VMware ESX Server 2: Architecture and performance aspects)
• HyperThreading Support in VMware ESX Server 2 (HyperThreading Support in VMware ESX Server 2)
• VMware ESX Server 2 NUMA Support (NUMA support in VMware ESX Server 2)

Optimizing and troubleshooting the performance in virtual environments
You must be the performance of the hardware and the host operating system sufficiently familiar, determine the performance impact on the virtual version can be. For a complete understanding of the native environment, these tools will help and guidance on benchmarking of VMware solutions.

•Performance Analysis on VMware ESX (Performance-Analyse in VMware ESX-Umgebungen)
•Performance Best Practices and Benchmarking Guidelines for VMware Infrastructure 3.5 (Best Practices for Performance and Benchmarking Guidelines for VMware Infrastructure 3.5)
•VMware Workstation 5.5: Performance Benchmarking Guidelines (Guidelines for Performance Benchmarking)
•VMware Workstation 6: Performance Benchmarking Guidelines (Guidelines for Performance Benchmarking)
•Using esxtop to Troubleshoot Performance Problems (Using esxtop to troubleshoot performance issues)

Precise synchronization of time in virtual machines
An accurate time synchronization is a critical requirement for all systems for performance measurements. The virtualization of the underlying hardware can affect the exact timing of a guest operating system. The following documents deal with this aspect and the opportunities, to overcome this problem.

•Timekeeping in VMware Virtual Machines (Synchronize the time in virtual machines)
•Improving Guest Operating System Accounting for Descheduled Virtual Machines (Improve the control of virtual machine guest operating systems with VMDesched)
Determine the performance in sub-

If you are familiar with the performance of subsystems, You can isolate specific areas for performance analysis. The following resources provide insight into the critical performance areas of virtual environments.

•Understanding Memory Resource Management in VMware® ESX™ Server (Memory resource management in VMware ® ESX Server ™)•Virtual Machine Monitor Execution Modes in VMware vSphere™ 4.0 (Virtual Machine Monitor-Ausführungsmodi in VMware vSphere™ 4.0)
•Scalable Storage Performance (Skalierbare Storage Performance)•Performance Comparison of Virtual Network Devices (Performance comparison of virtual network devices)
•VMware ESX Performance and Resource Management for CPU-Intensive Workloads (VMware ESX Performance and Resource Management for CPU-intensive workloads)