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Stephen Pierzchala

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Top Stories by Stephen Pierzchala

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 degradation? This article takes you through the steps you should follow in order to directly compare the results of two load tests and measure the performance improvement (or degradation) that occurred with the fixes put in place. Step 1: Identify issues and implement changes based on initial ... (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)

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)

Integrated Load Test Analysis

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 ... (more)

Super Bowl Sunday 2013 – Winners, Losers, and Casualties

No matter which team you were cheering for (or if you even watched the game at all), Super Bowl Sunday 2013 was more than a football game. Since the late 1990s, Super Bowl advertisers have tried to successfully link their TV ads to their online properties, sometimes with mixed results. Even 15 years later, companies can't always predict how well their sites will perform on the big day. But unlike the early days of TV/online campaigns, the problems are more complex than a site going down under heavy traffic. This year, some of the world's premier brands spent millions of dollars on... (more)