Best Practices

What’s derailing your digital transformation?

Today I shot my first Dynatrace video about digital performance. Yikes, not an easy task! But really, the point of this blog is to highlight “The Digital Performance and Transformation Audit”, a fresh piece of global research that shows some interesting insights around: The main barriers to digital transformation today The number of hours typically lost dealing with digital performance problems What teams would do if they recouped that lost time, … read more

Hunting and Fixing AWS DynamoDB Client Scalability Issues on Tomcat

As a performance consultant, I get called on to address various performance issues. One of our recent scalability issues happened on a micro service exposing a REST API. The micro service runs on Apache Tomcat, on an AWS EC2 instance, in a VPC. It uses ehcache as in-memory cache and Dynamo DB as persistent data source. DynamoDB gets updates from the source system using data pipeline built in Kinesis and Lambda functions. … read more

Correlating JavaScript Errors with Slow CDN Performance

JavaScript Errors can happen for many different reasons: special behavior of certain browsers that weren’t tested; a real coding mistake that slipped through the delivery pipeline; poorly handled timeouts, and I am sure the list goes on. In this blog we discuss yet a different reason which was brought to my attention by Gerald Madlsperger, one of our long term Dynatrace AppMon super users: A CDN server issue resulting in … read more

Hybrid Cloud Problem Patterns: Chasing DNS Lookup Times from AWS EC2

As a performance architect, I get called into various production performance issues. One of our recent production issues happened on Tomcat AppServer running on an AWS EC2 instance in a VPC. VPC is joined with an on-premise DNS server. This service calls another micro service. When service went live, we noticed a high response time from a downstream micro service, and the downstream service logs did not show any performance … read more

Dynatrace on Dynatrace: Detecting Regressions in Continuous Performance Environments

In my previous blog I addressed how we use Dynatrace on Dynatrace in our Continuous Functional Testing Environment. During that same visit to our engineering lab in Linz, Austria I also spoke with Thomas Steinmaurer, Performance Architect for Dynatrace. He oversees our Continuous Performance Environment. Dynatrace builds are deployed daily. Different load patterns are constantly running simulating traffic of thousands of agents. For this purpose we wrote our own performance testing tool because we have some … read more

Business Innovation through APM Metrics-Driven DevOps

Innovating faster to meet end-user demand is one of the challenges addressed by DevOps. DevOps bridges the knowledge gap about the impact between business and application teams. Application teams have to better understand the impact they have on business with code or deployment changes. On the other hand, business wants to better understand the impact on current development commitments when they come up with new requirements and a tight schedule. The … read more

Detecting the N+1 Asynchronous Thread Problem Pattern

I’ve been offering my help in analyzing performance data for quite a while now. Most of the time when analyzing PurePaths, load testing outputs or production log files, I find very similar problem patterns. This fact inspired us to automate problem detection in Dynatrace AppMon 6.5. Even though I think we cover a big part of common patterns, I am always on the lookout for something new – something I … read more

Cloud-Native Evolution: How Companies Go Digital

I’m pleased to announce that we’ve just released a new book on cloud migration strategies, reflecting on our experiences and lessons learned in working with many industry-leading companies around the world. It is co-authored by Peter Putz, Alois Mayr, Dirk Wallerstorfer, and noted full-stack developer Anna Gerber – a regular contributor to O’Reilly Media’s distinguished technology series. This book is specifically written for senior engineers and managers who want to learn … read more

Monitoring ASP.NET Core applications

One of the hot topics currently in the .NET community is CoreCLR and ASP.NET Core. As most probably you already know: Microsoft decided to create a cross platform, high performance version of ASP.NET, which they even open-sourced. What is ASP.NET Core? There are many great posts about the basics of ASP.NET Core, so in this post we do not talk about the programming model and the differences between ASP.NET Core … read more

Sitecore Performance Tips: What’s Geography Got to Do with It?

It’s not very often that data aligns perfectly to illustrate a topic. Typically, there are very clear trends among the outlying data points that clearly support the topic in question, but it’s rarely absolute. So, while researching Sitecore performance topics this week, I spotted data points that almost perfectly align to support the premise of Geographical Performance Variance in User Experience, that is, in layman’s terms, the further away the … read more