We walk through EXPLAIN plan fundamentals in PostgreSQL, why it’s helpful to compare EXPLAIN plans, the challenges presented by existing tools, and how to better compare query plans using pganalyze.

pganalyze's platform is a resource for database administrators, software engineers, and PostgreSQL users, offering insights into database performance optimization, query tuning, and database monitoring. Through articles, tutorials, and case studies, pganalyze offers insights into PostgreSQL internals, query execution plans, and database indexing strategies. Readers can learn about PostgreSQL configuration, performance troubleshooting techniques, and database optimization best practices to improve the efficiency and reliability of their PostgreSQL deployments. Additionally, pganalyze provides updates on the latest PostgreSQL releases, database management tools, and industry trends to help users stay informed and maximize the performance of their PostgreSQL databases.

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The Postgres EXPLAIN command is crucial for understanding query performance by showing the planner's reasoning. Comparing EXPLAIN plans helps identify why certain queries may perform poorly. pganalyze has developed a text-based diff interface for easier comparison of query plans, focusing on plan structure and execution metrics like buffers. This helps users refine queries for better performance.

Comparing EXPLAIN Plans is hard (and how pganalyze does it)

Building a bespoke EXPLAIN plan comparison