Welcome to vSphere-land!

What’s New in VMware vSphere 4: Performance Enhancements (VMware)
Performance Best Practices for VMware vSphere 4.0 (VMware)
VMware vSphere 4 Sets New Records in Virtualization Performance (VMware)
Virtualizing Performance-Critical Database Applications in VMware vSphere (VMware)
VMware vSphere 4 Performance with Extreme I/O Workloads (VMware)
Microsoft Exchange Server 2007 Performance on VMware vSphere 4 (VMware)
Performance Evaluation of VMXNET3 Virtual Network Device (VMware)
Storage System Performance Analysis with Iometer (VMware)
Database Sizing Charts for vSphere 4.0 (VMware VROOM! Blog)
Interpreting esxtop Statistics (VMware)
IOPs? (Yellow Bricks)
A sneak peek at vSphere 4 I/O goodness (and world records) (Virtual Geek)
vSphere Virtual Machine Performance Counters Integration into Perfmon (Boche.net)
New Performance Enhancements in VMware vSphere 4 (VMware Webcast)
VMware Performance Advancements and vSphere (video) (YouTube Video)
Storage performance improvements in vSphere 4.0 (VMware VROOM! Blog)
Database performance shines on vSphere 4 (VMware VROOM! Blog)
350,000 I/O operations per Second, One vSphere Host (VMware VROOM! Blog)
Java Performance on vSphere 4 (VMware VROOM! Blog)
VMware breaks the 50,000 SPECweb2005 barrier using VMware vSphere 4 (VMware VROOM! Blog)
Application Performance Improvement with DRS (VMware VROOM! Blog)
Comparing Performance of 1vCPU Nehalem VM with 2vCPU Harpertown VM (VMware VROOM! Blog)
Performance of Exchange Server 2007 in a Fault Tolerant Virtual Machine (VMware VROOM! Blog)

VMware ESX Server guest performance tips Pt .1
VMware ESX Server guest performance tips Pt. 2
VMware ESX Server guest performance tips Pt. 3
Top 12 ways to Improve Guest Server Performance under VMware ESX Server (VMworld 2006)
Tuning Windows Server 2003
Linux Performance and Tuning Guidelines
Performance Tuning Guidelines for Windows Server 2003
Performance Tuning for VI3 (VMworld 2006)
Performance Tuning Best Practices for ESX Server 3
ESX Server 3.0 Tips and Tricks (VMworld 2006)
VMware Infrastructure 3 - Best Practices for Performance (VMworld 2007)
Performance Monitoring and Capacity Planning (VMworld 2006)
A Performance Comparison of Hypervisors
Using esxtop to troubleshoot performance problems
ESX Server 2 Architecture and Performance Implications
ESX Server 2 Storage Subsystem Performance in ESX Server: Buslogic vs. LSI Logic
Performance Trends (VMworld 2007)
Performance Aspects of x86 Virtualization (VMworld 2007)
VMware ESX Server Storage Performance - A Scalability Study (VMworld 2007)
Understanding Performance in a Virtualized Environment (VMworld 2007)
Interpreting Performance Statistics in VI3 (VMworld 2007)
SPECweb2005 Performance on ESX Server 3.5
Performance of VMware VMI
What’s New in VMware Infrastructure 3: Performance Enhancements
Large Page Performance
VM Performance Monitoring and Logging
Virtual Platform Performance Benchmarking with VMmark (VMworld 2007)
Performance Monitoring and Analysis
Performance Tuning - Tips and Experiences from the Field (VMworld 2007)
Performance Benchmarking in Virtual Environments (VMworld 2007)
Storage Performance Analysis and Monitoring
VirtualCenter Performance Counters
Counters for Disk Performance
Scalable Storage Performance
Performance Best Practices and Benchmarking Guidelines
Using Perfmon in a Windows VM
Storage System Performance Analysis with Iometer
Interpreting esxtop Statistics
Understanding and Customizing VMware ESX Server Performance Charts

1. Understanding Performance in a Virtualized Environment (VMworld 2007) - A VMworld 2007 presentation on understanding virtulization performance and overhead as well as dispelling common myths.
2. Interpreting Performance Statistics in VI3 (VMworld 2007) - A VMworld 2007 presentation on understanding and interpreting VirtualCenter/ESX statistics in the VI Client and esxtop.
3. Performance Tuning Best Practices for ESX Server 3 - A white paper from VMware with performance tips that cover the most performance-critical areas of Virtual Infrastructure 3.
4. Top 12 ways to Improve Guest Server Performance under VMware ESX Server - A VMworld 2006 presentation with 12 tips for configuring hosts, virtual machines and guest environments for best performance.
5. Performance Monitoring and Capacity Planning - A VMworld 2006 presentation on performance tuning methodologies and approaches.
6. ESX Workload Analysis: Lessons Learned - A VMworld 2006 presentation on performing workload analysis and performance analysis of virtual workloads.
7. VMware ESX Server: Best Practices for Performance - A presentation from EMC World 2007 with recommended performance practices and benchmarking guidelines.
8. VM Performance Monitoring and Logging - A VMUG presentation from VMware on performance monitoring and using log files.
9. ESX3 Performance Tuning - A VMUG presentation from Long View Systems on performance tuning ESX hosts and virtual machines.
10. Performance Tuning for VI3 - A VMworld 2006 presentation on basic performance concepts, tools, technologies and recommendations.