PostgreSQL

Table of Contents

14.1. Using EXPLAIN

14.1.1. EXPLAIN Basics

14.1.2. EXPLAIN ANALYZE

14.1.3. Caveats

14.2. Statistics Used by the Planner

14.2.1. Single-Column Statistics

14.2.2. Extended Statistics

14.3. Controlling the Planner with Explicit JOIN Clauses

14.4. Populating a Database

14.4.1. Disable Autocommit

14.4.2. Use COPY

14.4.3. Remove Indexes

14.4.4. Remove Foreign Key Constraints

14.4.5. Increase maintenance_work_mem

14.4.6. Increase max_wal_size

14.4.7. Disable WAL Archival and Streaming Replication

14.4.8. Run ANALYZE Afterwards

14.4.9. Some Notes About pg_dump

14.5. Non-Durable Settings

Query performance can be affected by many things. Some of these can be controlled by the user, while others are fundamental to the underlying design of the system. This chapter provides some hints about understanding and tuning PostgreSQL performance.

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