10. Heavy Load Analysis

If a system is under heavy load, several thread dumps should be taken (e.g. every two minutes over a short period). The threads all have a thread id which can be mapped to real process ID on Linux/Solaris Systems. TDA parses the ID and displays it as "Native ID" in the thread view. Using top in light-weight-process view on Linux and prstat on Solaris with the process id of the java process where the thread dumps came from you can match this native ID to the threads in the dump. This way it is easy to identify threads which produce heavy load as the thread view in top and prstat shows the cpu load of each single thread.