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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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Indexing the Lookup Table

Indexing the Lookup Table

The Integration Service needs to query, sort, and compare values in the lookup condition columns. The index needs to include every column used in a lookup condition.
You can improve performance for the following types of lookups:
  • Cached lookups.
     To improve performance, index the columns in the lookup ORDER BY statement. The session log contains the ORDER BY statement.
  • Uncached lookups.
     To improve performance, index the columns in the lookup condition. The Integration Service issues a SELECT statement for each row that passes into the Lookup transformation.
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