PostgreSQL Indexing Strategies

Proper indexing dramatically improves query performance. Here's how to index effectively.

Best Practices#

Design:
✓ Index columns in WHERE clauses
✓ Index columns in JOIN conditions
✓ Index columns in ORDER BY
✓ Consider column order in compound indexes

Optimization:
✓ Use EXPLAIN ANALYZE
✓ Create partial indexes for subsets
✓ Use covering indexes for hot queries
✓ Remove unused indexes

Maintenance:
✓ Monitor index usage
✓ Reindex periodically
✓ Check for bloat
✓ Use CONCURRENTLY for production

Effective indexing requires understanding query patterns and PostgreSQL's index types. Use B-tree for most cases, GIN for arrays and JSONB, and partial indexes for filtered queries. Monitor usage with pg_stat_user_indexes and always test with EXPLAIN ANALYZE.

PostgreSQL Indexing Strategies

Index Types#

Basic Indexes#

Partial Indexes#

Expression Indexes#

JSONB Indexes#

Full-Text Search Indexes#

Array Indexes#

Query Analysis#

Index Maintenance#

Common Patterns#

When NOT to Index#

Best Practices#

Conclusion#

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