spring boot default connection pool size code example

Example: spring connection pool configuration

<bean id="hikariConfig" class="com.zaxxer.hikari.HikariConfig">
  <property name="maximumPoolSize" value="10" />
  <property name="minimumPoolSize" value="2" />
  <property name="dataSourceClassName" 
            value="oracle.jdbc.pool.OracleDataSource" />
  <property name="dataSourceProperties" ref="props" />
  <property name="poolName" value="springHikariCP" />
</bean>

<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource">
      <constructor-arg ref="hikariConfig" />
</bean>

<util:properties id="props" location="classpath:datasource.properties"/>