title: What is the difference between uptime and uptime_since_flush_status?
body: <p>I have been reading on mysql global status variables and I see two values:</p>
  <ul>
  <li>uptime</li>
  <li>uptime_since_flush_status</li>
  </ul>
  <p>What does <code>uptime_since_flush_status</code> mean?</p>