title: what does the field docs.deleted mean in elasticsearch _cat/indices API response?
body: <p>Here is the index statistics. </p>
  
  <pre><code>Avinashs-MacBook-Pro:~ avinashpandey$ curl 'localhost:9200/_cat/indices?v'
  
  health status index            pri rep docs.count **docs.deleted** store.size pri.store.size 
  
  yellow open   sitemonitor-5min   5   1    8151707       **221036**      1.2gb          1.2gb 
  </code></pre>
  
  <p>I am sure I have only been doing HTTP Post at /index/type/_id and have not deleted a single document. Where do these deleted docs come from then?</p>