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Databases Intermediate

What is Connection Pool?

A cache of database connections that can be reused, avoiding the overhead of creating new connections for each request.

Connection pooling maintains a set of open database connections that are shared among application threads. Creating a new database connection is expensive (authentication, SSL handshake, memory allocation), so pooling dramatically improves performance.

Popular connection poolers include PgBouncer (PostgreSQL), MySQL Connector pools, and application-level pools. Key settings include minimum/maximum pool size, connection timeout, and idle timeout.

Related Terms

Redis
An open-source, in-memory data store used as a database, cache, message broker, and queue with sub-millisecond response times.
Index
A data structure that improves the speed of data retrieval operations on database tables at the cost of additional storage.
Database Connection Pooling
A technique that maintains a cache of database connections for reuse, reducing the overhead of creating new connections.
Connection String
A formatted string containing all parameters needed to establish a connection to a database server.
Soft Delete
A pattern where records are marked as deleted with a flag or timestamp rather than being physically removed from the database.
Foreign Key
A column that creates a link between two tables by referencing the primary key of another table.
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