Andreas Grabner

About the Author

Andreas Grabner has been helping companies improve their application performance for 15+ years. He is a regular contributor within Web Performance and DevOps communities and a prolific speaker at user groups and conferences around the world. Reach him at @grabnerandi

Application Performance Clinics – Top Problems Solved in November

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Over the past few months I have been giving online and offline talks called Performance Clinics. During these clinics, I show you how to analyze performance and give you feedback on the data you’ve collected on your own application. For Dynatrace users, I run a special offer called “Share Your PurePath” where I provide feedback and can give you extend Dynatrace licenses. Every month I am going to write a short blog on the top problems found within the program so you get to ... More >

Dynatrace AJAX Edition 4.5 is here! Closing the Last Chapter, but the Story Continues

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Over the last couple of years the Dynatrace engineering team out of Linz, Austria continually updated one of the best browser diagnostics tools for Internet Explorer and Firefox on Windows. Back in 2009 it received strong endorsements from Steve Souders and John Resig and Dynatrace AJAX Edition became very popular. Today we are announcing the availability of our next -and final- Dynatrace AJAX Edition version. This release supports the latest version of Firefox and also ... More >

How to do a SharePoint Performance Sanity Check in 15 Minutes

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For some it’s hard to understand why SharePoint became that popular – and quite honestly – a lot of projects I’ve seen being implemented on SharePoint make me wonder why they chose SharePoint in the first place. But – there are a lot of great things about that platform that make it very interesting for enterprises to use it for various aspects. A big problem I see is that SharePoint Administrators, Operators and Developers of customized SharePoint solutions neglect the ... More >

Finding and Fixing Memory Leaks in Tibco Business Works

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We are working with a lot of performance engineers that have Tibco Business Works (BW) in the mix of technologies they are responsible for. This particular story comes from A. Alam – a performance engineer who is responsible for a large enterprise application that uses Tibco to connect their different system components. Alam and his team identified 2 unrelated memory leaks in their Tibco installation using Dynatrace Application Monitoring. One of the leaks was caused by a ... More >

Struts Performance Bug Almost Takes Down Car Rental Web site

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Special thanks for this great story to my colleagues Shaun Gautz and Andrew Samuels – two Dynatrace Guardians helping our customers to build better web applications. Struts is a framework very commonly used for building Java Web Applications. It’s also been used as the main web framework for a new car rental platform this story is based on. During load and performance testing it was discovered that the application couldn’t sustain a fraction of the load that was expected. ... More >

Hands-On Tutorial: 5 Steps to Identify Java and .NET Memory Leaks

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I keep getting questions about how to best analyze memory leaks – especially when they are not always reproducible by the developer on the local workstation. If you never experienced a memory leak issue (or you simply don’t admit it) then read up on some real life examples on our blog: Fixing Memory Leak in Java Production Environment or DevOps way to solving Memory Issues. If you want to test this out on your Java or .NET Application follow my steps in this blog, watch my ... More >

Find the Root Cause Faster with Dynatrace 6.1

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I am pleased to announce that Dynatrace 6.1 Beta is now available for everyone that is interested in building better performing applications. Dynatrace 6.1 includes many enhancements requested by our 83k+ user community. We took the feedback we received from our users and invested heavily in Ease of Use and more Automatic Diagnostics. Follow these steps to setup Dynatrace for a typical Java Web Application – or watch my YouTube Tutorials (for Java, .NET and PHP) – to see ... More >

How 15 Minutes Spent on Optimizing Performance Could Save you Millions in Lost Revenue

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Whether you are well established e-Commerce brand such as Nordstrom, JCPenny, or Costco, or a small business with a web shop, it’s never too late to do your end user performance homework. Robert, who developed and runs a “smaller” ASP.NET MVC based web shop, started getting individual user complaints about performance and usability problems. A simple online Performance Test  revealed that the site was not among the fastest when compared to other players in the ... More >

Web and App Server Monitoring Basics: Trending Transaction Performance and Throughput

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On our about:performance blog we talk a lot about problem patterns such as too many database statements, wasteful memory management leading too much garbage collection, web performance worst practices or performance of cloud and virtualized environments. I was recently intrigued by a couple of screenshots my colleague Reinhard showed me which give a perfect overview of load and response time behavior based on a set of very basic performance metrics. For me the following ... More >

Bad Deployments: The Performance Impact of Recursive Browser Redirect Loops

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100% Coverage I just recently wrote a blog about BOTs causing unwanted traffic on our servers. Right after I wrote this blog I was notified about yet another “interesting” and unusual load behavior on our download page which is used by customers to download latest product versions and updates: If you see such a load behavior you typically assume that you just released a new product version or maybe an update to our agents and many people are downloading it like crazy. ... More >