Load Testing

Top Tomcat Performance Problems: Database, Micro-Services and Frameworks

Slow or excessive SQL Queries; wrong configured connection pools; excessive service, REST and remoting calls; overhead through excessive logging or inefficient exception handling; as well as bad coding leading to CPU Hotspots, Memory Leaks, impact through Garbage Collection or stuck threads through synchronization issues. These are some of the top performance problems I analyzed through my “Share Your PurePath” program last year. A big “Thank You!” to all our… read more

Diagnosing Common Database Performance Hotspots in our Java Code

When I help developers or architects analyze and optimize the performance of their Java application it is not about tweaking individual methods to squeeze out another millisecond or two in execution time. While for certain software it is important to optimize on milliseconds I think this is not where we should start looking. I analyzed hundreds of applications in 2015 and found most performance and scalability issues around bad architectural… read more

Update: Countdown to Premiere of Star Wars, The Force Awakens: Digital Performance Is Essential for Related Sites

Star Wars, The Force Awakens Premieres – A Look at the Digital Performance of Ticket Purchasing and Merchandising Sites Under the Force of Online Visits Update: December 22nd, 2015 Star Wars Digital Performance – “Epilogue” Update “When I left you, I was but the learner; now I am the master” So as we wrap up the Star Wars weekend, all reports (spoiler free here) say that Star Wars, The Force… read more

Production: Performance where it REALLY matters!

“Production is where performance matters most, as it directly impacts our end users and ultimately decides whether our software will be successful or not. Efforts to create test conditions and environments exactly like Production will always fall short; nothing compares to production!” These were the opening lines of my invitation encouraging performance practitioners to apply for the recent WOPR24 (Workshop On Performance and Reliability). Thirteen performance gurus answered the… read more

Shift-Left Quality with Dynatrace Personal License

In the past year I have helped scores of developers, testers, architects and ops analyze the quality, performance and scalability problems of the business critical apps for which they are responsible. They shared their data via Share Your PurePath which allowed me to provide them quick feedback on the technical root cause of why an application won’t scale or is slow. All of these fine people had one thing in common: They looked… read more

Tibco Business Events Entity Cache Performance Trap

Thanks again for another great story from A. Alam – a performance engineer working for Infosys Ltd. who conducts large scale load tests for a very large enterprise. Mr. Alam and team shared this story from a JMeter load test they ran in their production Tibco Business Events environment. The load test was meant to verify performance of item availability system which manages rest calls and large scale… read more

Live Blog: Tracking Super Bowl Ad Performance

Update: February 1st, 2015, 11:15pm EST So let’s see during the game who was the fastest and who was the slowest in terms of response time.  In the following chart we see that Heinz, Cheerios, Beats, Subway and Carmax took the top spot. Beats really surprised us, but lets come back to them in a moment. Hear are slowest sites we say during the game. I think… read more

Preview: Super Bowl Ad Performance Tests Are in Place

This weekend marks the 49th annual Super Bowl! If you aren’t psyched to watch the big game, you can still be entertained by the extravagant commercials companies pay millions for each year. Hopefully, if you work in the IT department of one of these companies you’ve already load tested the landing pages the commercials will be sending people to during the game so they don’t crash. We’ve got monitoring in… read more

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

In Part I of this blog I explained which metrics on the Web Server, App Server and Host allow me to figure out how healthy the system and application environment is: Busy vs. Idle Threads, Throughput, CPU, Memory, et. Cetera. In Part II, I focus on the set of metrics captured from within the application server (#Exceptions, Errors, …) as well as the interaction with the database (connection pools,… read more