A practical guide to database connection pooling using Node.js, PostgreSQL, and the node-postgres (pg) library. Explains the concept with a taxi analogy, then demonstrates implementation by comparing normal client connections vs. pooled connections. Uses Prometheus prom-client to measure performance, showing pooled connections completing queries nearly 3x faster. Also covers drawbacks like pool exhaustion, idle connections, and security considerations, with pointers to PgBouncer for production use cases.
Table of contents
Table of ContentsWhat exactly is connection pooling?Connection Pooling Demonstration with PostgreSQL and PrometheusPotential Drawbacks of Connection PoolingConclusionSort: