Semab Tariq shows off a tool for Postgres:
PgBouncer is a lightweight yet powerful connection pooling tool for PostgreSQL. It efficiently manages and reuses database connections, reducing the load on the server and improving performance. It acts as an intermediary between applications and the PostgreSQL database, optimizing connection usage and enhancing scalability.
This is a bit different from SQL Server, where connection pooling is built in. Read on to see how it works.