title: elasticsearch / kibana errors "Data too large, data for [@timestamp] would be larger than limit
body: <p>On my test ELK cluster, I'm encountering the following error when trying to see data from the last week. </p>
  
  <pre><code>Data too large, data for [@timestamp] would be larger than limit
  </code></pre>
  
  <p>The warning about shards failing appears to be misleading because the elasticsearch monitoring tools <code>kopf</code> and <code>head</code> show that all shards are working properly, and the elastic cluster is green. </p>
  
  <p><img src="https://i.stack.imgur.com/Efu8S.png" alt="enter image description here"></p>
  
  <p>One user in the google group for elasticsearch suggested increasing ram. I've increased my 3 nodes to 8GB each with a 4.7GB heap, but the issue continues. 
  I'm generating about 5GB to 25GB of data per day, with a 30 day retention. </p>