title: why the real time SQL monitor in sql developer(oracle) turns me no selection? What are the steps to see the performance metrics in sql developer?
body: <p>why the real time SQL monitor in sql developer(oracle) turns me no selection? What are the steps to see the performance metrics in sql developer?</p>
  <p><img src="https://i.stack.imgur.com/9tjb4.png" alt="enter image description here" /></p>