Postgres Support Recap: Investigating Postgres Query Performance` is a comprehensive guide to troubleshooting Postgres query performance issues. The article outlines three strategies for investigating query performance problems: analyzing query performance with `pg_stat_statements`, checking cache hit ratios, and identifying table or index bloat. It also introduces the free and open-source monitoring tool `PgHero`, which provides a graphical interface for monitoring Postgres query performance. By following these strategies, developers can identify and address common causes of poor query performance in their Postgres databases.