title: Try set initial pool size of database connections (spring-boot)
body: <p>So, i have a application that uses spring-boot 1.4.0 and a Oracle database. I'm trying to define the number of connections of the pool in the application.properties, using these configs:</p>
  
  <pre><code>spring.datasource.driverClassName = oracle.jdbc.OracleDriver
  spring.datasource.url = url
  spring.datasource.username = username
  spring.datasource.password = password
  spring.datasource.maxActive= x
  spring.datasource.initialSize= y
  spring.datasource.testWhileIdle = true
  spring.datasource.validationQuery = SELECT 1 from dual
  </code></pre>
  
  <p>And i'm using the query</p>
  
  <pre><code>select *from V$SESSION where username= 'username';
  </code></pre>
  
  <p>to check the database connections, but when i run the application it's always using 10 connections, despite what i define as the initialSize. I tried to check other stackoverflow answers and examples on GitHub and i don't know why it's not working, so i would appreciate if someone can help me. Thanks!</p>