Introduction Let's say you experience some performance issues of your Oracle SOA 11G servers, and after some research you know that you need to tune your JVM...
Introduction Let's say you experience some performance issues of your Oracle SOA 11G servers, and after some research you know that you need to tune your JVM heap size, and turn on some JVM debugging to monitor such as Garbage Collection behaviour. Main Article After some due diligence of reading WebLogic documents and Internet postings, you found the right flags to use, and the right values to set. It typically looks something like -Xmx4096M -Xms4096M -Xmn3072M...
Introduction Let's say you experience some performance issues of your Oracle SOA 11G servers, and after some research you know that you need to tune your JVM heap size, and turn on some JVM...
While delivering a training recently, I got a request to put together a JVM tuning cheat sheet. Given the 50+ parameters available on the Sun hotspot, this...
While delivering a training recently, I got a request to put together a JVM tuning cheat sheet. Given the 50+ parameters available on the Sun hotspot, this request is understandable. The diagram below is what I came up with. I’ve tried to narrow down the most important flags that will solve 80% of JVM performance needs with 20% of the tuning effort. This article assumes basic JVM tuning knowledge - the different generations used in the Sun hotspot JVM, different garbage...
While delivering a training recently, I got a request to put together a JVM tuning cheat sheet. Given the 50+ parameters available on the Sun hotspot, this request is understandable. The diagram below...
*Reposted with permission from Oracle’s Networking Blog and Neeraj Gupta So this is not for the faint heart. I am going to give you a roller coaster ride going...
*Reposted with permission from Oracle’s Networking Blog and Neeraj Gupta So this is not for the faint heart. I am going to give you a roller coaster ride going at 40 Gb/s. Used some shark teeth and cut the InfiniBand packets apart to show you some screenshots here. Just kidding, dont worry. This post is about how to capture InfiniBand packets and then view them in latest Wireshark. Mellanox has generously released a nice and powerful utility called ibdump. You can visit their...
*Reposted with permission from Oracle’s Networking Blog and Neeraj Gupta So this is not for the faint heart. I am going to give you a roller coaster ride going at 40 Gb/s. Used some shark teeth and...
Introduction ThreadLogic version 0.95 is available for public download now. Main Article Additional Features Biggest change is support for externalizing the...
Introduction ThreadLogic version 0.95 is available for public download now. Main Article Additional Features Biggest change is support for externalizing the Advisories and group definitions. Users can use the pre-defined AdvisoryMap.xml to come up with custom advisories with their own definition of what constitutes an advisory - name, pattern/keyword, health, description, advice and let ThreadLogic tag the matching threads with your custom advisory when it finds a match....
Introduction ThreadLogic version 0.95 is available for public download now. Main Article Additional Features Biggest change is support for externalizing the Advisories and group definitions. Users can...
Introduction This is a topic I have been interested in for a while. I have seen it done by some of my colleagues, especially in AIA environments, and I have...
Introduction This is a topic I have been interested in for a while. I have seen it done by some of my colleagues, especially in AIA environments, and I have been waiting to get an opportunity to work on it and document it. Main article But I recently found a great article from Daniel Amadei here. I strongly encourage you to take a look at it if you are at all interested in test automation and/or continuous integration. I am planning to build this kind of testing into my...
Introduction This is a topic I have been interested in for a while. I have seen it done by some of my colleagues, especially in AIA environments, and I have been waiting to get an opportunity to work...
Introduction Eric Gross and Sabha Parameswaran, from Oracle FMW Architects Team (The A-team) are happy to introduce ThreadLogic, an open source Thread Dump...
Introduction Eric Gross and Sabha Parameswaran, from Oracle FMW Architects Team (The A-team) are happy to introduce ThreadLogic, an open source Thread Dump Analyzer tool, to the Middleware community. Main Article The current set of TDA tools (Samurai/TDA) don't mine the thread dumps or provide a more detailed view of what each thread is doing while just limiting themselves to reporting the state (locked/waiting/running) or the lock information. They don't mention the type of...
Introduction Eric Gross and Sabha Parameswaran, from Oracle FMW Architects Team (The A-team) are happy to introduce ThreadLogic, an open source Thread Dump Analyzer tool, to the Middleware...
Introduction This posting is the fourth and final section in the series Analyzing Thread Dumps in Middleware In this section, we will introduce ThreadLogic, a...
Introduction This posting is the fourth and final section in the series Analyzing Thread Dumps in Middleware In this section, we will introduce ThreadLogic, a Thread Dump Analyzer tool developed by the author of this blog (Sabha Parameswaran in collaboration with his colleague, Eric Gross, also from Oracle A-Team) and its capabilities as well as some real world samples of thread dump analysis before concluding the series. ThreadLogic As mentioned earlier, the current set of...
Introduction This posting is the fourth and final section in the series Analyzing Thread Dumps in Middleware In this section, we will introduce ThreadLogic, a Thread Dump Analyzer tool developed by...
Introduction This posting is the third section in the series Analyzing Thread Dumps in Middleware Main Article This section details with tools for analyzing...
Introduction This posting is the third section in the series Analyzing Thread Dumps in Middleware Main Article This section details with tools for analyzing thread dumps along with limitations of such tools. Thread Dump Analysis Tools Earlier in the series, we saw how to capture thread dumps and analyze manually the threads and dependencies and bottlenecks. Sometimes the number of threads can be quite large with real big stack depths making manual analysis quite tedious and...
Introduction This posting is the third section in the series Analyzing Thread Dumps in Middleware Main Article This section details with tools for analyzing thread dumps along with limitations of such...
Introduction This posting is the second section in the series Analyzing Thread Dumps in MiddlewareThis section details with when, how to capture and analyze...
Introduction This posting is the second section in the series Analyzing Thread Dumps in MiddlewareThis section details with when, how to capture and analyze thread dumps with special focus on WebLogic Application Server related thread dumps. Subsequent sections will deal with more real-world samples and tools for automatic analysis of Thread Dumps. Main Article The Diagnosis Everyone must have gone through periodic health checkups. As a starting point, Doctors always order...
Introduction This posting is the second section in the series Analyzing Thread Dumps in MiddlewareThis section details with when, how to capture and analyze thread dumps with special focus on WebLogic...
