Table of Contents

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  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Aggregator transformation
  6. Cleanse transformation
  7. Data Masking transformation
  8. Data Services transformation
  9. Deduplicate transformation
  10. Expression transformation
  11. Filter transformation
  12. Hierarchy Builder transformation
  13. Hierarchy Parser transformation
  14. Hierarchy Processor transformation
  15. Input transformation
  16. Java transformation
  17. Java transformation API reference
  18. Joiner transformation
  19. Labeler transformation
  20. Lookup transformation
  21. Machine Learning transformation
  22. Mapplet transformation
  23. Normalizer transformation
  24. Output transformation
  25. Parse transformation
  26. Python transformation
  27. Rank transformation
  28. Router transformation
  29. Rule Specification transformation
  30. Sequence Generator transformation
  31. Sorter transformation
  32. SQL transformation
  33. Structure Parser transformation
  34. Transaction Control transformation
  35. Union transformation
  36. Velocity transformation
  37. Verifier transformation
  38. Web Services transformation

Transformations

Transformations

Optimizing the cache size

Optimizing the cache size

For optimal mapping performance, configure the cache sizes so that
Data Integration
can run the complete transformation in the cache memory.
  1. On the
    Advanced
    tab of the transformation properties, set the tracing level to verbose initialization.
  2. Run the task in auto cache mode.
  3. Analyze the transformation statistics in the session log to determine the cache sizes required for optimal performance.
    For example, you have a Joiner transformation called "Joiner." The session log contains the following text:
    CMN_1795 [2023-01-06 16:16:59.026] The index cache size that would hold [10005] input rows from the master for [Joiner], in memory, is [8437760] bytes CMN_1794 [2023-01-06 16:16:59.026] The data cache size that would hold [10005] input rows from the master for [Joiner], in memory, is [103891920] bytes
    The log shows that the index cache size requires 8,437,760 bytes and the data cache requires 103,891,920 bytes.
  4. On the
    Advanced
    tab of the transformation properties, enter the value in bytes that the session log recommends for the cache sizes.

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