Table of Contents

Search

  1. Preface
  2. Understanding Pipeline Partitioning
  3. Partition Points
  4. Partition Types
  5. Pushdown Optimization
  6. Pushdown Optimization and Transformations
  7. Real-time Processing
  8. Commit Points
  9. Row Error Logging
  10. Workflow Recovery
  11. Stopping and Aborting
  12. Concurrent Workflows
  13. Grid Processing
  14. Load Balancer
  15. Workflow Variables
  16. Parameters and Variables in Sessions
  17. Parameter Files
  18. FastExport
  19. External Loading
  20. FTP
  21. Session Caches
  22. Incremental Aggregation
  23. Session Log Interface
  24. Understanding Buffer Memory
  25. High Precision Data
  26. POWERCENTERHELP

Advanced Workflow Guide

Advanced Workflow Guide

Troubleshooting Aggregator Caches

Troubleshooting Aggregator Caches

Use the information in this section to help troubleshoot caching for an Aggregator transformation.
The following warning appears when I use the cache calculator to calculate the cache size for an Aggregator transformation:
CMN_2019 Warning: The estimated data cache size assumes the number of aggregate functions equals the number of connected output-only ports. If there are more aggregate functions, increase the cache size to cache all data in memory.
You can use one or more aggregate functions in an Aggregator transformation. The cache calculator estimates the cache size when the output is based on one aggregate function. If you use multiple aggregate functions to determine a value for one output port, then you must increase the cache size.
Review the transformation statistics in the session log and tune the cache size for the Aggregator transformation in the session.


Updated July 04, 2018