Default connection pool for tomcat in spring-boot?

Question

What is the default value used for maximum connections on a postgres database with tomcat connection pooling using spring-boot?

There is a property spring.datasource.maxActive, but when I try to sysout it, I'm getting an exception:

@Value("${spring.datasource.maxActive}")
private String act;

java.lang.IllegalArgumentException: Could not resolve placeholder 'spring.datasource.maxActive' in string value "${spring.datasource.maxActive}

Solution 1

According to org.apache.tomcat.jdbc.pool.PoolProperties the default value is 100

Solution 2

You need to set spring.datasource.max-active in your application.properties or application.yaml to get the value in your bean class

Refer https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html for common application.properties