title: ELK: Metricbeat Visualize: Fielddata is disabled on text fields by default. Set fielddata=true on [beat.name]
body: <p>Using metricbeat 5, ES5, on Kibana5 I am getting this error in red:</p>
  
  <pre><code>Visualize: Fielddata is disabled on text fields by default. Set fielddata=true on [beat.name] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory.
  </code></pre>
  
  <p>What does it mean? Where do I config it?</p>