Table of Contents

Search

  1. Preface
  2. Summary of PowerExchange New Features and Changes
  3. PowerExchange Installation and Upgrade
  4. PowerExchange Agent
  5. PowerExchange Client for PowerCenter
  6. PowerExchange Condense
  7. PowerExchange Listener
  8. PowerExchange Logger for Linux, UNIX, and Windows
  9. PowerExchange Navigator
  10. PowerExchange Monitoring and Tuning
  11. PowerExchange Utilities
  12. PowerExchange for Adabas
  13. PowerExchange for CA Datacom
  14. PowerExchange for DB2 for i
  15. PowerExchange for DB2 for Linux, UNIX, and Windows
  16. PowerExchange for DB2 for z/OS
  17. PowerExchange for CA IDMS
  18. PowerExchange for IMS
  19. PowerExchange for Microsoft SQL Server
  20. PowerExchange for MySQL
  21. PowerExchange for Oracle
  22. PowerExchange for PostgreSQL
  23. PowerExchange for SAP HANA
  24. PowerExchange for VSAM and Flat Files
  25. PowerExchange ODBC

PowerExchange Express CDC for Oracle Performance Considerations

PowerExchange Express CDC for Oracle Performance Considerations

PowerExchange Express CDC for Oracle processing of large transactions can degrade performance.
If CDC performance becomes degraded when the configured maximum redo log records in the MEMOPS parameter is exhausted and PowerExchange Express CDC for Oracle creates spill files to free up resources, perform the following steps:
  1. Ensure that the storage used for spill files is not the root cause of the performance degradation. Performance might be severely degraded if slow network storage is used for the spill files.
  2. Modify the SPILLMAX and SPILLFILEBUFFSZ parameters in the OPTIONS statement.
    • SPILLMAX=2097151. Reduce the number of spill files to improve efficiency.
    • SPILLFILEBUFFSZ=1024. Increase the file buffering for spill files to decrease physical I/O.
  3. If the previous steps do not improve performance, consider increasing the MEMOPS parameter value in the OPTIONS statement of the PowerExchange Express CDC for Oracle configuration file to a level that is sufficient to process the change data volume in memory.
For more information, see the "Express CDC for Oracle" chapter in the
PowerExchange CDC Guide for Linux, UNIX, and Windows
.

0 COMMENTS

We’d like to hear from you!