Connection Pooling

Connection Pooling Cheat Sheet

Explains why database connection pooling matters, how pool sizing works, and configuration patterns for tools like PgBouncer and application-level pools.

What is Connection Pooling?

Connection pooling is a technique where a fixed set of pre-established database connections is reused across multiple requests instead of opening and closing a…

How Do You Tune a Database Connection Pool?

A connection pool is tuned by sizing it to the database's actual concurrency capacity rather than the application's thread count, then adjusting timeouts and e…

How Do You Tune Database Connection Timeouts?

Tuning connection timeouts means setting separate limits for connection acquisition, query execution, and idle connections so that a slow dependency fails fast…

What is Database Connection Multiplexing?

Database connection multiplexing is the technique of sharing a small pool of real database connections across a much larger number of client requests, typicall…

What is Database Connection Pooling and Why Does It Matter?

Database connection pooling is the practice of maintaining a reusable set of pre-established database connections that application threads borrow and return, i…

What is Little’s Law and How Do You Apply It?

Little’s Law states that the average number of requests in a system (L) equals the average arrival rate (lambda) multiplied by the average time each request sp…

What Causes Database Connection Storms and How Do You Prevent Them?

A database connection storm happens when a large number of application instances or processes simultaneously attempt to open new database connections, typicall…