WebSphere for z/OS V5 JVM Dump and Heap Analysis Tools

An IBM Redpaper publication

Note: This is publication is now archived. For reference only.

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Published on 28 December 2004, updated 08 March 2005

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IBM Form #: REDP-3950-00


Authors: Dave Clarke, Dave Griffith and Rica Weller

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    Abstract

    This IBM Redpaper describes problem analysis tools for the WebSphere for z/OS production environment:

    - Svcdump.jar

    - HeapRoots

    - Dumpviewer GUI and jformat

    To analyze heap-related issues such as OutOfMemoryError and other crashes, as well as hangs or loops within WebSphere address spaces with a level of degree similar to that of older deployment environments such as CICS and IMS, use the relatively low impact tool of unformatted dumps and Java virtual machine (JVM) internal information.

    This Redpaper goes into great detail about the switched virtual circuit (SVC) Analyzer, explaining what svcdump.jar is, where to get it and when and how to use its utilities. Finally, we list several samples for different parameter settings.

    The HeapRoots utility and the DumpViewer GUI are mentioned for further information.

    Table of Contents

    Introduction

    Why use these tools?

    Svcdump.jar

    HeapRoots

    Dumpviewer GUI and jformat

    Summary

    The team that wrote this Redpaper

     

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