Table of Contents

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  1. Preface
  2. Part 1: PowerExchange Change Data Capture Introduction
  3. Part 2: CDC Components Configuration and Management
  4. Part 3: CDC Sources Configuration and Management
  5. Part 4: Change Data Extraction
  6. Part 5: Monitoring and Tuning
  7. Appendix A: CDC for z/OS Troubleshooting
  8. Appendix B: DTL__CAPXTIMESTAMP Time Stamps

Performance Rules and Guidelines

Performance Rules and Guidelines

To achieve the best the performance for the PowerExchange Logger for z/OS, consider the following rules and guidelines:
  • The PowerExchange Logger is a high-performance started task. Assign it to an appropriate Workload Manager (WLM) service class. For more information, see Using WLM Service Classes to Prioritize PowerExchange CDC Started Tasks on z/OS.
  • If you anticipate a large volume of captured data, allocate buffers and data sets that are larger than those allocated in the sample startup procedures.
  • Consider defining more active log data sets than the number specified in the sample startup procedures.
  • Allocate the Logger active logs, emergency restart data sets, and the Archive Log Copy1 on high-performance DASD.
  • The PowerExchange Logger is a long-running MVS started task. Therefore, ensure that your existing MVS system parameters or JCL does not cancel the PowerExchange Logger after a specified amount of CPU time or time.
    To prevent cancellation of the PowerExchange Logger after a specified amount of CPU time or time, you need to specify
    TIME=1440
    or
    TIME=NOLIMIT
    in the EXEC statement of the PowerExchange Logger startup procedure.

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