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English
  • PowerExchange for CDC and Mainframe 10.5.3
  • All Products

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

CDC Guide for z/OS

CDC Guide for z/OS

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Linkage Indexes and Common Data Spaces

Linkage Indexes and Common Data Spaces

You might need to increase the values of the NSYSLX and MAXCAD parameters in the EASYS
xx
 member of the SYS1.PARMLIB library.
To determine whether to increase these values, use the following guidelines:
  • Each PowerExchange Agent requires two linkage index entries.
    During warm start processing, the PowerExchange Agent reuses the linkage index entries. During cold start processing, two new linkage index entries are used. Consider increasing the NSYSLX parameter of the EASYS
    xx
     member in SYS1.PARMLIB.
  • Each PowerExchange Agent uses one common data space.
    If you use the SHUTDOWN command with the COMPLETELY option to stop the PowerExchange Agent, PowerExchange CDC deletes the data space. However, if you do not specify the COMPLETELY option, the data space persists.
    When you restart the PowerExchange Agent, the agent reuses the data space if it exists, unless you are performing a cold start. Consider increasing the MAXCAD parameter of the EASYS
    xx
     member in the SYS1.PARMLIB to enable increased usage of common data spaces.
If you change the NSYSLX and MAXCAD parameter, you must IPL the z/OS system for the changes to take effect.
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