title: Finding the best learning rate in tensorflow object detection
body: <p>I want to search for the best learning rate using tensorflow object detection api. But in the config file I'm not able to find anything for it. I can add <code>schedule</code> but it can't search for the best learning rate.</p>
  
  <pre><code>learning_rate: {
              manual_step_learning_rate {
                initial_learning_rate: 0.003
                schedule {
                  step: 6000
                  learning_rate: .0003
                }
                schedule {
                  step: 12000
                  learning_rate: .00003
                }
  </code></pre>
  
  <p>Is there any trick or way to search for best learning rate.</p>