Wednesday Jun 19, 2013

WLS Cluster Messaging Protocols on A-Team Chronicles

Oracle A-Team has launched a new Oracle A-Team Chronicles web site for all A-Team generated content that cover architecture, product features, technical tips, performance tuning, troubleshooting and best practices on Oracle Middleware products.

There is a new blog post on WLS Cluster Messaging protocols in the A-team chronicles. For more details on it and related A-Team recommendations, kindly refer to Weblogic Server Cluster Messaging Protocols.

Wednesday Nov 21, 2012

Exalogic 2.0.1 Tea Break Snippets - Modifying the Default Shipped Template

Having installed your Exalogic Virtual environment by default you have a single template which can be used to create your vServers. Although this template is suitable for creating simple test or development vServers it is recommended that you look at creating your own custom vServers that match the environment you wish to build and deploy. Therefore this Tea Time Snippet will take you through the simple process of modifying the standard template.

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Friday Feb 17, 2012

Introducing ThreadLogic

Eric Gross and Sabha Parameswaran, from Oracle FMW Architects Team (The A-team) are happy to introduce ThreadLogic, an open source Thread Dump Analyzer, to Oracle Fusion Middleware community and customers. 

Motivation behind ThreadLogic

The current set of TDA tools (Samurai/TDA) do not mine the thread dumps. Neither do they provide a more detailed view of what each thread is doing. Most of the existing tools tend to limit themselves to reporting the state (locked/waiting/running) or the lock information.  They don't go into details of the type of activity within a thread, should it be treated as normal or deserving a closer look? Can a pattern or anti-pattern be applied against them? Any possible optimizations? Are there any hot spots? Any classification of threads based on their execution cycles? 

We decided to create ThreadLogic to address these deficiencies. It is based on a fork of the TDA open source tool with new capabilities to analyze and provide advice based on a set of extensible advisories and thread grouping while supporting all JVM thread dumps. Also, a thorough and in-depth analysis of WebLogic Server thread dumps is provided. Both the thread grouping and advisories are extensible where user can add new patterns to match and tag or group threads. Please check the attached document for more details of the tool.

The latest stable bits (version 0.9) and documentation can be downloaded from here.  For more details on the tool's capabilities, please check the documentation page.

Our hope is that this tool would go a long way in improving and helping both internal teams (Support/Dev/Field) and external customers in terms of better analysis and faster issue resolutions.

Feedback welcome.

Thursday Feb 09, 2012

Analyzing Thread Dumps In Middleware

How to analyse Thread dumps, for improving Middleware Performance (at App Server or Application level) as well as for general troubleshooting? This series goes into when and how to capture thread dumps, analysis methodologies, review of TDA tools and an enhanced version of existing TDA tool that can analyze more in depth with special focus on WebLogic Server related dumps as well as some real world samples of thread dump analysis before concluding the series. 

Analyzing Thread Dumps - Series:

Part 4: TDA A-Team and real world samples

Part 3: TDA tools

Part 2: How to capture and analyze Thread Dumps, navigate lock chains

Part 1: Basics of Thread states and thread locking

[Read More]

Tuesday Jan 31, 2012

Welcome to A-Team Exalogic and Cloud Application Foundation Blog

We are very excited to have this blog to share our experiences with Exalogic, WebLogic, Coherence, Tuxedo, Enterprises Manager and JDK/JrockIT tuning and other topics. Our goal is to provide interesting solutions, best practices, tips and tricks, performance tunings, how-to’s, troubleshooting, workarounds, architectural tradeoffs and similar topics.

We hope our followers will take away something of value from our experiences that they will be able to apply in their endeavors to successfully deploy Oracle Fusion Middleware related products.

Other A-Team Blogs

Thank you for visiting and please come back soon.


The primary contributors to this blog are comprised of the Exalogic and Cloud Application Foundation contingent of Oracle's Fusion Middleware Architecture Team, fondly known as the A-Team. As part of the Oracle development organization, The A-Team supports some of Oracle's largest and most strategic customers worldwide. Our mission is to provide deep technical expertise to support various Oracle field organizations and customers deploying Oracle Fusion Middleware related products. And to collect real world feedback to continuously improve the products we support. In this blog, our experts and guest experts will focus on Exalogic, WebLogic, Coherence, Tuxedo/mainframe migration, Enterprise Manager and JDK/JRockIT performance tuning. It is our way to share some of our experiences with Oracle community. We hope our followers took away something of value from our experiences. Thank you for visiting and please come back soon.


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