title: Amazon RDS CPU spikes
body: <p>Does anybody have an idea why we have these hourly spikes in CPU usage on our Amazon RDS database?
  We don't have any crons running every hour so it seems to be some internal RDS stuff because it's exactly every hour.</p>
  
  <ul>
  <li>Does RDS do some index updates or something every hour?</li>
  <li>What's the best way to find out what is causing this?</li>
  </ul>
  
  <p><img src="https://i.stack.imgur.com/ewvPS.png" alt="RDS hourly spikes"></p>