login vsi company logo login vsi company logo 250x40

 

Get the best possible VDI performance, density and availability with Login VSI
Our Solutions

Analyzing Login VSI Results

Analyzing Login VSI Results

What is the most important aspect of running Login VSI tests? The test results, of course! You can use the Login VSI Analyzer to know the maximum capacity of your environment and find specific performance bottlenecks. This video should help you better understand, interpret and analyze your first Login VSI tests.

The Login VSI Analyzer will automatically sort out the data collected during the test. It will calculate if the target environment has reached its saturation point and if so, at how many concurrent sessions. This point is called the VSImax and indicates at how many users your environment can support before they experience performance degradation.

Let’s look at an example. On a server running VMware ESX with 150 Windows 7 desktops running Office 2010, I have executed a test to figure out the VSImax. A bit more detail: These desktops were 32bit VMs with 2 virtual CPUs and 1GB of memory.

analyzing login vsi results vsimax 148

On the horizontal axis you see the number of active users and the vertical axis shows the response times in milliseconds. This graph also indicates to me that there are zero stuck sessions. If you see a lot of stuck sessions in your Login VSI test, it typically indicates something is wrong in the environment.

In this chart, the VSImax of 148 is the most important number. This tells me the system can tolerate 148 users before any of them would start to notice lacking performance (such as slow logon time).

Let’s check out another test I have executed on the same platform. The only thing I have changed in the environment is an upgrade from Microsoft Office 2010 to Microsoft Office 2013 so I can measure the impact of that change.

analyzing login vsi results vsimax 112

Right away, I spot that the maximum amount of users I can run on the platform has dropped by about 20% from 148 users to just 112 users. The only thing I changed in the environment was the version of Microsoft Office. This clearly shows why every change needs to be validated before bringing it to production.

To find out what exactly is causing this bottleneck, I can overlay performance data from different systems like logfiles from your storage device, perfmon results, XenServer or as in this example, ESXtop logfiles. As long as it is captured in a CSV file, you can overlay it. In this case, CPU is the bottleneck.

analyzing login vsi results external data

Another interesting metric is the baseline. This number indicates the performance of the system with little or no stress. A higher baseline indicates a slower performance in general, so it’s best to keep the baseline as low as possible. The baseline is typically influenced by storage, anti-virus software, workspace managers, and so on. The baseline is also used to calculate the threshold of the VSImax (this is the baseline + 1000 milliseconds).

If you have further questions regarding this post contact me using Twitter: @MarkPlettenberg or via support@loginvsi.com, by the way, what's your VSImax?

Ps. also make sure to watch this video for a technical introduction of Login VSI.

 


 

Start using Login VSI today

Our industry-standard software is built to help you avoid problems, lower costs and improve performance. Request a Quote or get your free Trial below, and benefit from our award-winning services.

Free Price Request  Your Free Trial

 


About the company Login VSI

The company Login VSI provides end-user performance insights for virtualized desktop and server-based computing environments. Enterprise IT departments use flagship product Login VSI (for load testing) and Login PI (for continuity testing) in all phases of their virtual desktop deployment—from planning to deployment to change management—to build and safeguard a good performance, a high availability, and (as a result) a good and consistent end-user experience. For more information about Login VSI or for a free test license contact us.

About the author

Mark Plettenberg (@markplettenberg) is a product manager of Login VSI and has played a critical role in the development and growth of Login VSI. Ask Mark about motorcycle mechanics and breaking/repairing anything and everything that has a power plug.


Tags: How-to, Login VSI, Videos, Best Practices, VSImax, Support

Popular Blogs

Login VSI Blog - Ongoing Effects CPU Flaws

The Ongoing Effects of Intel CPU Flaws

The Ongoing Effects of Intel CPU Flaws Over the last year, we’ve seen many Intel CPU hardware flaws come to light and when news first broke about Meltdown & Spectre there was a lot of panic: "should we patch?", "What’s the performance impact?", "Can we still rely on this hardware?" Continue Reading
Login VSI Blog - Updating to Windows 10 1903? Make Sure to Test!

Updating to Windows 10 1903? Make Sure to Test!

Updating to Windows 10 1903? Make Sure to Test! It’s that time of the year again. Microsoft have released their spring update and the first IT-Pro’s are getting ready to move their VDI environment over. Continue Reading
Login AT Express offers Application Compatibility Testing for up to 50 applications for FREE

[Press Release] Login VSI introduces free license for award winning solution, Login AT

Login AT Express offers Application Compatibility Testing for up to 50 applications for FREE Atlanta, USA, May 22, 2019: Login VSI, the industry standard for VDI and SBC performance testing, announced today the availability of a new, free version of Login AT for Bulk Application Compatibility Testing. Continue Reading
Login VSI Blog - LVTE 2109 - Technology Advocates & Experts

Login VSI Technology Advocates and Experts 2019

About a year ago Login VSI, the industry standard in VDI performance testing, announced a new program Recognizing those individuals that have built and displayed extensive knowledge of the Login VSI software solutions, and visibly contribute to the End-User Computing (EUC) Community. Continue Reading
Introducing Login PI 3.4

Introducing Version 3.4 of Login PI

What’s New & Different - Introducing Version 3.4 of Login PI We've updated Login PI, the benchmark in unplanned-change and gradual-deterioration detection for VDI. New features include improving the way information is collected & distributed, the way customized workloads are created & the way actual tests are executed. Continue Reading
Login VSI Blog - What's New in Login PI 3.5

What's New in Login PI 3.5?

What's New in Login PI 3.5? Netscaler, SLA Reporting, Event Logging features and so much more! At the end of June, we released a new version of Login PI 3 bursting with new features and enhancements. There are so many that I could write pages of blog about it, but let’s just keep it simple and focus on some of the big items. Continue Reading
Cookie Settings