Preface
Performance Tuning Overview
- Performance Tuning Overview
Bottlenecks
Optimizing the Target
Optimizing the Source
Optimizing Mappings
Optimizing Transformations
Optimizing Sessions
Optimizing Grid Deployments
Optimizing the PowerCenter Components
Optimizing the System
Using Pipeline Partitions
Appendix A: Performance Counters

Performance Tuning Guide

10.5
- 10.5.6
- 10.4.0

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Dropping Indexes and Key Constraints

When you define key constraints or indexes in target tables, you slow the loading of data to those tables. To improve performance, drop indexes and key constraints before you run the session. You can rebuild those indexes and key constraints after the session completes.

If you decide to drop and rebuild indexes and key constraints on a regular basis, you can use the following methods to perform these operations each time you run the session:

Use pre-load and post-load stored procedures.

Use pre-session and post-session SQL commands.

To optimize performance, use constraint-based loading only if necessary.

Optimizing the Target

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