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Monthly Archives: February 2009

New Timekeeping Articles

As part of an ongoing effort to improve our understanding of
and our external content around timekeeping and virtualization, a new
series of articles have been developed. Knowledge base article
1420 has been retired as part of this initiative.

The new timekeeping articles are:




best practices for Linux


using TSC clocksource stops responding


falls behind in a virtual machine when the guest operating system
writes to previously unwritten regions of its virtual disk


falls behind in virtual machine when the memory of the virtual machine
paged from disk by the VMkernel


in a virtual machine drifts due to hardware timer drift


in a Linux 2.6 guest operating system runs faster than real time due to
lost tick overcompensation


runs too fast in a Windows virtual machine when the Multimedia Timer
interface is used


drifts in the virtual machine and the service console due to the HPET
misreporting its frequency


in a Linux virtual machine jumps backward when using clock=pit


runs slower than real time due to lost timer interrupts


and changing the rate of timer interrupts a guest operating system

Knowledge Base Alerts

Knowledge Base Alerts are something you may have noticed on the main page of the Knowledge base. They look like this:


What are Alerts and why should you care?

Alerts are Knowledge Base articles like any other except:

  • They may have particular importance to you
  • They may have far reaching implications for you
  • They may contain time-sensitive information

There you go. Now you know to keep a keen eye out for our Knowledge base alerts.

Rating Knowledge Base Articles

Something you may have noticed during your latest visit to the VMware Knowledge Base is a new rating system (see red arrow in screencap).

Rating Knowledge Base Articles

The Knowledge base Team wants to know your opinion of its articles in the
knowledge base. Five stars is a good rating, and one star is poor.
VMware considers a 4 or 5 rating as indicating the article is a
success.  Anything 3 or below is considered an article that requires work/improvements.

There’s also a Provide Feedback link. This opens a
new window giving you the opportunity to provide us even more feedback
on the knowledge base article. See example:

KB feedback

If you haven’t rated an article yet, please do!

Knowledge Base Upgrade

We recently performed an upgrade to both the hardware and software that powers the Knowledge Base here at VMware including new, more robust hardware located in a new datacenter, and a software upgrade.

You might notice these changes in the way things work:

  • Streamlined the Main Page.
  • A section called Top Issues replaces what was previously What’s Popular. It provides the same functionality, displaying articles that have been linked the most within the past 30 days.
  • A new selection box that allows you to search based on Document Type, KB Article, Communities, or Product Documentation.

Watch for more enhancements soon…

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Welcome to the VMware Knowledge Base Blog

Welcome to the VMware Knowledge Base Blog!

We are the VMware Knowledge Base Program Team.  You would know us as the producers and maintainers of the VMware Knowledge Base at http://kb.vmware.com our self-service body of technical content. But there's a lot more that goes on behind the scenes.

The purpose of this blog is to bring you, our customer, closer to us and engage in a way that helps us all. We are keenly interested in your opinion and take great pride in our ability to act quickly.  Over the last year we have focused a great deal of time and energy into making VMware’s Knowledge Base accurate and up-to-date and plan to continue that effort.

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