title: Default maximumPoolSize for HikariCP
body: <p>What is the default connection pool size that spring boot HikariCP provides when the container loads?</p>
  
  <p>of course, I am using below properties to setup max cp size, but I was wondering what is the default CP size if we don't give any number in the application.properties file.</p>
  
  <pre><code>spring.datasource.hikari.minimumIdle=5
  spring.datasource.hikari.maximumPoolSize=20
  spring.datasource.hikari.idleTimeout=30000
  spring.datasource.hikari.poolName=SpringBootJPAHikariCP
  spring.datasource.hikari.maxLifetime=2000000
  spring.datasource.hikari.connectionTimeout=30000
  </code></pre>
  
  <p>And if I give a max pool size in application.properties as 100 and I use only 20, will that affect my application performance?</p>