title: Confusion in configuration of SonarQube with PostgreSQL DB
body: <p>I have SonarQube 5.6 version installed and RDS PostgreSQL DB connected to it on AWS. I have this setup since a long time and many projects run on every day schedule on SonarQube. Not getting any issue or errors there. but looks like my Database configuration is not correct. because when i looked into Database. I don't see much more movement or anything stored there. I have updated conf/sonar.properties files with database endpoint and credentials. It looks like it's connected. How to make sure this? like, my database is getting used by sonarqube?</p>
  
  <p>Because sonarQube documentation is saying, No database required after 5.2 version.</p>
  
  <p>can someone please explain me architecture, What is right way to setup this?</p>
  
  <p>I am getting an error as follow,</p>
  
  <p>INFO web[o.sonar.db.Database] Create JDBC data source for jdbc:postgresql:sonarprod.cyfa9ycgfky0.us-east-1.rds.amazona‌​ws.com 2017.02.24 19:54:03 
  ERROR web[o.a.c.c.C.[.[.[/]] Exception sending context initialized event to listener instance of class org.sonar.server.platform.PlatformServletContextListener java.lang.IllegalStateException: Can not connect to database. Please check connectivity and settings (see the properties prefixed by 'sonar.jdbc.').</p>
  
  <p>I have checked everything is correct in connection string, username, password. all looks correct to me. I have specific ports open for communication. what does this error means? what am i missing?</p>
  
  <p>Thanks in Advance.</p>