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Monitor. Resolve. Prevent.

Alois Reitbauer

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Top Stories by Alois Reitbauer

The increasing adoption of mobile applications as part of a company's online services leads to the question of whether we need to monitor it like other parts of our IT infrastructure. As they are part of our shipped application services we need to ensure they are working properly. However, not every application must be monitored the same way. In addition, monitoring always comes at a certain cost. We need people to take care of the monitoring, we have to prepare our applications to be ready for monitoring and we potentially also have to buy or at least integrate new monitoring tools. Before talking about how we have to monitor them we need to figure out whether and how much to invest in monitoring. As with classical applications, not every application is worth the effort of detailed production monitoring. An obvious decision criterion is business value. If the cost o... (more)

Hunting Lost Treasures: Understanding and Finding Memory Leaks

Searching for memory leaks can easily become an adventure – fighting through a jungle of objects and references. When the leak occurs in production time is short and you have to act fast. Like in a treasure hunt, we have to interpret signs, unravel mysteries to finally find the “lost” memory. Memory leaks – together with inefficient object creation and incorrect garbage collector configuration – are the top memory problems. While they are a typical runtime problem, their analysis and resolution worries developers. Therefore I will focus in this post on how to analyze memory pr... (more)

Challenges in Tracing JavaScript Performance by Example

In an earlier article I already discussed several approaches towards end-user experience (or performance) monitoring including their pros and cons. In this article I will present a simple real world sample which shows the limits of performance traceability in AJAX applications. As I don’t like Hello World samples, I thought I’d rather build something a bit more useful. The sample uses the Twitter API to search for keywords. The search itself is triggered by typing into a textbox. While the sample isn’t spectacular from a technical perspective, I will make it more interesting by ... (more)

Building Your Own Amazon CloudWatch Monitor in Five Steps

Cloud Computing on Ulitzer Amazon EC2 offers the CloudWatch service to monitor cloud instances as well as load balancers. While this service comes at some cost (0,015$/hour/instance) it offers useful infrastructure metrics about the performance of your EC2 infrastructure. While there are commercial and free tools out there which provide this service, you might not want to invest in them or add another tool to your monitoring infrastructure. This post will provide step-by-step guidance on how to extend your monitoring solution to retrieve cloud metrics. The code sample is based on t... (more)

Transactions in a JPA World

The use of transactions is a cornerstone when building database applications. However in our daily work, we often do not really care much about them. In many cases they are handled implicitly for us by the (J EE) container or application framework – such as Spring – we are using. We rely on these frameworks to do a lot of the heaving lifting around transactions. At a pure JPA level there is a lot of transaction-related logic going on under the hood. This article discusses transactions at the JPA and database (JDBC) layer and how they play together and affect the functionality and... (more)