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CPU Contention %RDY with CPU Limits %MLMTD

We all know about ‘Ready’ time (%RDY in esxtop) – so high Ready time is bad – right?  Now what happens if you’re using CPU ‘Limits’ either on a specific guest or resource pool? Limits can artificially...

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Apples to Oranges – Performance Comparisons Gone Awry

I’ve been involved in a few scenarios recently where “a virtual machine isn’t performing as well as it was on physical” and virtualization was blamed. So where should one start troubleshooting this? In...

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Checking vSphere Monitor Modes and Performance Implications

There are two forms of hardware assist that vSphere can leverage if your server platform supports them.  The vSphere monitor will determine if they are available and use them appropriately.  They can...

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How to Collect Useful Performance Data

Despite the fact my role is pre-sales – I spent a lot of time digging into client performance statistics with them.  I wanted to document some of the more common ways to collect and review performance...

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Do Consolidation Ratios Matter Anymore?

I was on a road trip recently and had a number of discussions about consolidation ratios as a measure of success.  This worried me.  Especially considering that these were large virtual adopters and I...

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vSphere Performance Presentation at PEX

I’m very excited to be presenting at VMware’s Partner Exchange 2011 in Orlando.  In this session I’ll be covering why I’m confident you can virtualize your Tier 1 apps on the vSphere platform,...

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Troubleshooting vSphere 4.1 Performance Issues – Updated Whitepaper

I’m excited to highlight that VMware, specifically Chethan Kumar, has released an updated Performance Troubleshooting guide for vSphere. The document was originally penned by Hal Rosenberg and has been...

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VMware vSphere 5.0 – Performance Unleashed

Its been quiet recently…very quite…because something BIG was being created… Finally I’m able to share some of my excitement with the virtualization community around VMware’s next major release –...

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Performance Best Practices for VMware vSphere 5.1

Once again, VMware has pulled together an incredible team of Performance resources to revise and then release a new Performance Best Practices guide for vSphere 5.1.  Kudos to the team! Available here:...

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Poll: Which storage protocol do you use and why in vSphere?

I’ve recently been having some great conversations around different storage protocols and their performance differences/capabilities.  In that light, I wanted take this opportunity to poll the larger...

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