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  • Common Content for Data Integration 10.5.8
  • All Products

Table of Contents

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  1. Preface
  2. Performance Tuning Overview
  3. Target Optimization
  4. Source Optimization
  5. Transformation Optimization
  6. Mapping Optimization
  7. Partitioned Mapping Optimization
  8. Run-time Optimization
  9. SQL Data Service Optimization
  10. Web Service Optimization
  11. Connections Optimization
  12. Data Transformation Optimization

Performance Tuning Guide

Performance Tuning Guide

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Pushdown Optimization Rules and Guidelines

Pushdown Optimization Rules and Guidelines

The Data Integration Service can push transformation logic to the source database.
The following rules and guidelines apply to pushdown optimization:
  • The Data Integration Service can push Lookup and Joiner transformation logic to the source database if the sources are in the same database management system and they use identical connections.
  • The Data integration Service cannot push transformation logic to a source that has a binary data type.
  • The Data Integration Service disables pushdown optimization when you have an IBM DB2 data source and the column precision is between 28 to 31 digits for the Decimal data type.
  • The Data Integration Service enables pushdown optimization for an SQL Data Service or a Web Service by default. You cannot disable pushdown optimization for an SQL Data Service or Web Service.
  • The Data Integration Service cannot push an Aggregator transformation that contains an expression with aggregate and non-aggregate functions in a port that is not group by.
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