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23.9 Summary

You should now be familiar with the following concepts:

  • The measurements of performance:

    • Response Times

    • Resource Utilization

    • System throughput

    • Scalability

  • Understanding the importance of repeatablitiy and ability to re-create problems in assessing impacts of changes.

  • Understanding the impact of tuning of z/OS subsystems to the overall performance of WebSphere on z/OS.

  • Estimating the impact of various topologies on performance.

  • Assessing the health of the JVM and garbage collection.

  • Using the monitoring tools for WebSphere and z/OS and know which apply to different types of problems.

  • Selecting the front-end topology that best meets your needs for performance, reliability, and simplicity.

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