Version 2.1
Created by Jinwoo Hwang (jinwoo@us.ibm.com)
Welcome to IBM Performance Analysis Tool for Java for Windows.
IBM Performance Analysis Tool is one of Jinwoo Hwang's garage projects. The following is the list of garage projects ranking top downloads at alphaWorks:
The following is list of Jinwoo Hwang's other tools:
IBM Performance Analysis Tool for Java help you detect Java threads that consume unanticipated large amounts of system resources You can find more information at http://www.alphaworks.ibm.com/tech/pat4j
To provide automatic detection of Java threads that consume the majority of system resources (processor, paging activity and virtual address space) and that cause performance degradation all without interruption of a target system which is critical to production systems running business applications 24x7.
The Performance Analysis Tool presented here is much different from other performance tools that are widely available. Because it does not employ profiling, it does not have the high overhead dependency and greatly reduces the likelihood of possible down time when concurrently running the profiler. This makes this tool particularly attractive for production environments, where starting and stopping to evaluate the performance results can greatly harm one's productivity.
When resource is constraining the system, it is crucial to find threads that consume majority of system resources if any. This technology analyzes Windows performance log and Java thread dumps and automatically detect Java threads that consume majority of system resources, for example :
Target system does not need to be restarted or interrupted to execute the technology.
This technology does not require any additional profiling components or 3rd party libraries that are oftentimes intrusive, and can cause large amounts of overhead and results in system instability which is undesirable for production use. This technology is suitable primarily on production systems, since it does not require interruption of target system to enable or disable system resource monitoring. It provides overall system resource usage for Java threads, execution status of Java threads and stack trace of Java threads along with a user friendly graphical interface. Normally, the expectation is to only receive just processor usage monitoring when employing profiling methods, whereas with this tool, the effects on performance of paging, disk I/O and virtual memory size are also reported.
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