Spring Boot database connection pooling

Spring Boot provides database connection pooling out of the box. This means that Spring Boot will manage a pool of database connections that can be reused by your application. This can help to improve the performance and scalability of your application.

Spring Boot uses HikariCP by default as the database connection pool. HikariCP is a high-performance, lightweight JDBC connection pool.

To configure database connection pooling in Spring Boot, you can use the following properties in your application.properties file:

Properties

spring.datasource.url=jdbc:mysql://localhost:3306/my_database
spring.datasource.username=root
spring.datasource.password=password

# HikariCP connection pool configuration
spring.datasource.hikari.maximum-pool-size=10
spring.datasource.hikari.minimum-idle=1
spring.datasource.hikari.idle-timeout=30000
spring.datasource.hikari.max-lifetime=60000

The maximum-pool-size property specifies the maximum number of connections that the connection pool will maintain. The minimum-idle property specifies the minimum number of idle connections that the connection pool will maintain. The idle-timeout property specifies the amount of time that a connection can be idle before it is closed. The max-lifetime property specifies the maximum amount of time that a connection can be in use before it is closed.

You can also use additional HikariCP properties to configure the connection pool. For more information, please see the HikariCP documentation: https://github.com/brettwooldridge/HikariCP.

Once you have configured database connection pooling in Spring Boot, you can start using Spring Boot to interact with your database. Spring Boot will automatically manage the connection pool for you.

Here are some additional tips for using database connection pooling in Spring Boot:

• Use a connection pool size that is appropriate for your application's needs. If the connection pool size is too small, your application may experience performance problems. If the connection pool size is too large, you may waste resources.
• Tune the idle timeout and max lifetime properties to prevent connections from being closed unnecessarily.
• Monitor the connection pool to ensure that it is working properly. You can use the Spring Boot Actuator to monitor the connection pool.

By following these tips, you can help to improve the performance and scalability of your application using database connection pooling.