How I Reduced Startup Time By ~80% Using Database Connection pool?

A connection pool is a cache of database connections maintained so that the connections can be reused when needed, reducing the overhead of establishing new connections each time the application interacts with the database.

A database connection pool is a mechanism used to manage and reuse database connections in a Java backend application. It helps improve the efficiency and performance of interactions between the application and the database by minimizing the overhead of creating and closing connections for every database operation

Here’s how a database connection pool works in a Java backend:

Setting Up the Connection Pool:

• During the application startup phase, a set of initial database connections is established and added to the connection pool.
• The connection pool maintains a minimum and maximum number of connections that it can hold at any given time.

Requesting a Connection:

• When the application needs to interact with the database, it requests a connection from the connection pool.
• If there is an available connection in the pool, it is handed over to the application.

Reusing Connections: