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Stephen Pierzchala

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Top Stories by Stephen Pierzchala

Andreas Grabner described how he used the Compuware APM PureStack technology to identify the server-side performance issues during a recent load test run against the Compuware APM Community Portal, a production application used by our customers. He was able to quickly identify the CPU bottleneck that caused the performance degradation in the server environment, leading to an almost immediate resolution of the issue. Bridging the Gap between Ops and Apps Data by adding Context: One picture that shows the Hotspots of "Horizontal" Transaction as well as the "Vertical" Stack. But what about the external performance recorded during this load test? What would a customer have experienced if they had tried to access the site during this time? Well, at the peak of the test, I used WebPageTest to capture a video of the APM Community Homepage loading (Note: The video has been... (more)

Holiday 2012: In the First Week of the Season, My Site Performance Was...

It's been a busy and successful seven days for online retailers. Black Friday and Cyber Monday traffic and sales were well above 2011, and there was the extra benefit to those businesses that started deals on Thanksgiving Night. The traffic data collected by the Compuware Ecommerce and Retail Real use Monitoring index matched almost exactly the pattern seen by Akamai for all of their US ecommerce and retail customers on the three busiest days. Mobile Commerce Performance for many mobile sites has been cited elsewhere as being slow on Black Friday and Cyber Monday. Looking at the... (more)

Evolving an APM Strategy for the 21st Century

I started in the web performance industry - well before Application Performance Management (APM) existed - during a time when external, single page measurement ruled the land. In an ecosystem where no other solutions existed, it was the top of the data chain to support the rapidly evolving world of web applications. This was an effective approach to APM, as most online applications were self-contained and, compared to the modern era, relatively simple in their design. A state-of-the-art web application, circa 2000 Soon, a new solution rose to the top of the ecosystem - the synth... (more)

How Internet Outages Can Affect Your Application

Complexity is the new reality of web and mobile applications with almost no new release going out without the addition of services and applications spread across many different companies. But the reality of this new interrelationship is still the same: If a third-party Internet outage or issue occurs, your brand is the one that is affected. With up to 1,500 distinct third-party services available to choose from around the world, it is sometimes difficult to even identify what a service does when it appears in your applications. This forces your team to not only be fully aware of... (more)

Part 2: An Integrated Approach to Load Test Analysis

In a Part 1, I demonstrated how to add more depth to the analysis of a Compuware APM Web Load Test by combining the external load results with the application and infrastructure data collected by the Compuware PureStack Technology. But, now that we have tested the system once, what would happen if we tested it again after we identified and "resolved" the issues we found? Would running a test using the same parameters as in the initial test show a clear performance improvement? Would the system be able to achieve the desired load of 200 virtual users with little or no performance ... (more)