title: Spring-Boot: How do I set JDBC pool properties like maximum number of connections?
body: <p>Spring-Boot is a pretty awesome tool, but the documentation is a bit sparse when it comes to more advanced configuration. How can I set properties like the maximum size for my database connection pool?</p>
  
  <p>Spring-Boot supports <code>tomcat-jdbc</code>, <code>HikariCP</code> and <code>Commons DBCP</code> natively are they all configured the same way?</p>