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

Key Performance Metrics For Load Tests Beyond Response Time- Part I

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Whether it is JMeter, SoapUI, Load Runner, SilkTest, Neotys or one of the cloud-based load testing solutions such as Keynote, Dynatrace (formerly Gomez) or others, breaking an application under heavy load is easy these days. Finding the problem based on automatically generated load testing reports is not. Can you tell me what is wrong based on the following reports? My Key Metrics from Web Server to Database I’ve helped engineering organizations over the last 10 – 15 ... More >

C# Performance Mistakes – Top Problems Solved in December

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As part of my Share Your PurePath and Performance Clinic initiatives, I get to see a lot of application performance problems where I help people like you figure out what’s wrong. Last month I gave insight into how users Russell and Joe optimized their Java and Web applications for size and speed. In this blog, I will share lessons learned from a C# application fellow user Ram (works as a performance engineer for a large financial organization) is responsible for. Chatting ... More >

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 >