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IT Briefcase Exclusive Interview: New Solutions Keeping Enterprise Business Ahead of the Game

IT Briefcase Exclusive Interview: New Solutions Keeping Enterprise Business Ahead of the Game

with Sander Barens, Expereo
In this interview, Sander Barens...

IT Briefcase Exclusive Interview: The Tipping Point – When Things Changed for Cloud Computing

IT Briefcase Exclusive Interview: The Tipping Point – When Things Changed for Cloud Computing

with Shawn Moore, Solodev
In this interview, Shawn Moore,...

Driving Better Outcomes through Workforce Analytics Webcast

Driving Better Outcomes through Workforce Analytics Webcast

Find out what’s really going on in your business...

Legacy Modernization: Look to the Cloud and Open Systems

Legacy Modernization: Look to the Cloud and Open Systems

On the surface, mainframe architecture seems relatively simple: A...

Still keeping your hybrid power systems indoors?  It’s time for change.

Still keeping your hybrid power systems indoors? It’s time for change.

Mobile telecommunications network equipment is expected to work without...

The Late Great Virtual CPU Debate

June 9, 2011 No Comments

Blog post by Ken Hess

Do you ever have the situation where you have a sluggish virtual machine (VM) and in trying to find the bottleneck, you raise the number of vCPUs? Did it work? If your VM experiences a slowdown, then the problem is the extra vCPU(s). It’s counterintuitive to see this occur but it’s a real phenomenon. To clarify, you might experience a performance hit by adding vCPUs to a VM. Crazy, yes, but there are some good reasons for it.

You also want to be careful of using multiple vCPUs and then moving back to a single vCPU. Some operating systems don’t do well with that change. Windows Server 2003 being one of them.

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