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  • PowerCenter 10.4.0
  • All Products

Table of Contents

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  1. Preface
  2. Performance Tuning Overview
  3. Bottlenecks
  4. Optimizing the Target
  5. Optimizing the Source
  6. Optimizing Mappings
  7. Optimizing Transformations
  8. Optimizing Sessions
  9. Optimizing Grid Deployments
  10. Optimizing the PowerCenter Components
  11. Optimizing the System
  12. Using Pipeline Partitions
  13. Performance Counters

Performance Tuning Guide

Performance Tuning Guide

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Optimizing Aggregator Transformations

Optimizing Aggregator Transformations

Aggregator transformations often slow performance because they must group data before processing it. Aggregator transformations need additional memory to hold intermediate group results.
Use the following guidelines to optimize the performance of an Aggregator transformation:
  • Group by simple columns.
  • Use sorted input.
  • Use incremental aggregation.
  • Filter data before you aggregate it.
  • Limit port connections.
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