Performance, Scalability and Architecture

Andreas Grabner

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Top Stories by Andreas Grabner

Microsoft and Sun recently announced their Open Source Project Stonehenge at the JavaOne conference. Stonehenge is a reference implementation that shows how to bridge the two major development platforms Java and .NET using Web Services. This initiative definitely puts the spotlight on heterogeneity and the challenges that come with it. Interoperability on the platform level is just the starting point of bridging the two worlds. It leads to further challenges down the road and several questions that come with it: Who needs interoperability? How does it affect team productivity? Is it all about application stacks? How effective can we diagnose problems? How to calculate TCO 1 + 1 = 2 or 3? Who needs interoperability? There are different use cases where companies need to think about interoperability Integrating different systems implemented on different platforms, e.g.: ... (more)

Sync Your Timeouts: When Load Balancers Cause Database Deadlocks

Have you seen this error message before "java.sql.Exception: ORA-00060: deadlock detected while waiting for resource"? This is caused when parallel updates require locks on either rows or tables in your database. I recently ran into this exception on an instance of an IBM eCommerce Server. The first thought was that there are simply too many people hitting the same functionality that updates Sales Tax Summary information - which was showing up in the call stack of the exception: Exception stack trace showing that createOrderTaxes ran into the deadlock issue on the database The ... (more)

Performance Analysis of Dynamic JavaScript Menus

RIA Developer's Journal on Ulitzer In my previous article I talked about the impact of jQuery Selectors on a page that I analyzed. The page took 4.8 seconds in the onLoad event handler. 2 seconds were mainly caused by the selectors as described in the blog. The other 2.8 seconds were caused by a dynamic JavaScript menu - in that particular case it was the superfish jQuery plugin. A closer analysis showed why it takes so long and this also got me to do some research on these menus. Kudos to Joel Birch for his excellent plugin - easy to integrate - and - if properly used - its fas... (more)

Developers Think Functionality

Two weeks ago I co-hosted a Webinar with one of our users – Bill Mar, Director of Engineering Services from SmithMicro Software. SmithMicro provides the backbone of our digital life by connecting different digital devices together. In his role, Bill works in the Wireless Business unit working on Voice-related services, e.g.: VoiceSMS or Visual Voicemail – services that we’ve all become used to since we run around with smart phones such as the iPhone or Blackberry. Bill talked about how SmithMicro had to move towards Proactive Performance Management as the company and the user ba... (more)

Performance and Architecture Validation with Existing Unit Tests

Agile Development Practices have widely been adopted in R&D Organizations. A core component is Continuous Integration where code changes are continuously integrated and tested to achieve the goal of having "potential shippable code" at the end of every Sprint/Iteration. In order to verify code changes agile team members write Unit or Functional Tests that get executed against every build and every milestone. The results of these tests tell the team whether the functionality of all features is still given and that the recent code changes have not introduced a regression. Verify... (more)