To all my readers I want to thank you! Over the last couple of years I've gotten lots of great feedback and comments on this blog. It has been read over 386,000 times as of 2/13/2011. I hope you'll join me on my new blog where I hope to put out more real...

While looking through past performance talks and presentations I came across this talk done at a BlackBoard.com conference and since it was already in the public domain I thought it worth sharing here. Keep in mind while the tuning principles are timeless...

Hard to believe it has been eight months since my last post. I've been deep into Windows Sercurity and Reliabiltiy and was fortunate enough to have a chance to contribute to one of the two features I'm briefly blogging about today - RemoteFX. So what...

Hyper-V’ers, A SAP on Hyper-V paper was just brought to my attention. It has a very good overview of Hyper-V and how it benefits SAP,  The document focuses on getting SAP running well in Hyper-V and has lots of great technical information. ...

If you have been looking for VHD performance data the paper below should give you a lot of what you have been looking to find. The paper compares VHD performance on Windows Server 2008 and Windows Server 2008 R2. It uses the new Native VHD implementation...

I’ve seen a number of threads and questions recently around iSCSI performance in virtual machines.  If you are looking for Hyper-V information I suggest you check out the following paper: iSCSI 10 Gigabit Ethernet Performance Tuning With Windows...

Anthony F. Voellm (aka Tony) 12/17/2009 http://blogs.msdn.com/tvoellm This FAQ is titled R2 since it updates the original FAQ as of the Windows Server 2008 R2 Hyper-V.  Since Hyper-V originally released we have continued to improve it.  We have...

Thanks to many of you for finding value in this blog. I hope you have enjoyed the content and you'll see more Hyper-V in the near future. For example I have a blog coming titled "Hyper-V Performance FAQ R2" coming soon. I've changed the name of the...

When the first version of Hyper-V launched last year we worked really hard to make it a great performing product.  From what I’ve heard from all of you we did just that – delivered a great performing product.  Now in less than a year we have...

A buddy of mine [Liang Yang] recently shared the following table with me and I thought you might also find it useful with trying to simulate various workloads. In particular when testing and evaluating Hyper-V. A tool like IOMeter [from www.iometer...

Now that Hyper-V has been in the market for over 9 months a common question that has come my way is “what should I monitor?” This question has been asked for a couple of reasons such as; How do I know if my machine is overloaded? How can I figure out...

Hyper-V’s primary target is servers.  We love it when you run it on your desktop however you might encounter some challenges.  One such challenge is that once Hyper-V is installed on your desktop box you might find the overall system performance...

There have been a number of issues with time in W2k3 guests, the first of which was covered in http://blogs.msdn.com/tvoellm/archive/2008/06/05/negative-ping-times-in-windows-vm-s-whats-up.aspx .  The first issue involved negative ping times. A recent...

Wow this is great day. The SQL team has worked really hard in creating a performance guidance document with solid suggestions and performance numbers when running on WS08 Hyper-V. They looked at OLAP and OLTP workloads. Even if you are not running...

There are a couple of performance counter sets in Hyper-V that show memory usage. These counters tend to show memory used by one component of the system and the "Hyper-V VM Vid Numa Node" counter set is no different. This counter set is intended to...

There are not many performance knobs in Hyper-V which is by design. We really seek out of the box performance. However if you are looking for that last bit of performance from your Virtual Machines (VM’s) and have already made a good selection for networking...

Hyper-V Perfies, In a previous blog entry I explained the different types of storage choices you have with Hyper-V. However we had nore released yet so no numbers could be published. You can find the original post below... http://blogs.msdn.com...

Hyper-V Perfies, Now available to the general public is Windows Server 2008 (WS08) Hyper-V 24 Logical Processor (LP) Support. This revises our RTM support limit of 16 Logical Processors. We also increased the number of supported running virtual...

Below is a great link on how to get BizTalk 2006 working on top of Hyper-V. It includes practical advice that applies to other servers and roles as well. Check it out... http://msdn.microsoft.com/en-us/library/cc768518.aspx Tony

There are a number of groups building management software (OEMs, Microsoft, …) for Hyper-V which is cool to see. A common ask from these teams has been around reading and computing VM CPU usage. The following is an example of how to compute Hyper-V...

Wow its been a great ride helping get Hyper-V to perform the way it does. So much so I've not posted in a while. You will see some upcoming posts on performance counters, WMI perf interfaces, and real data (yes now with RTM I can post data). In the...

The Windows Server Performance team has updated teh Window Server 2008 Tuning guide to include Hyper-V. The Hyper-V section provide a lot of recommendations you will find useful. Check it out below... http://blogs.technet.com/winserverperformance...

Issue #1: A number of customers has reported than VM's fail to start when there is plently of memory. The error reported from the Hyper-V manager is displayed below. Here I tried to start a 4GB VM when there was 7+GB free. What's going on? The most...

Hyper-V Performance FAQ Anthony F Voellm (aka Tony) 6/19/2008 http://blogs.msdn.com/tvoellm [**** NOTE THIS IS NOW OLD. ****] [**** SEE THE NEW FAQ at ****] [**** http://blogs.msdn.com/tvoellm/archive/2009/12/18/hyper-v-performance...

Just a quick blog post that might help you resolve an issue that some customers have seen running under Hyper-V VM's. The issue is negative ping times on multi-processor guests. If you see negative ping times in multiprocessor W2k3 guest OSes you might...