title: Elasticsearch results limit issue
body: <p>I have a python script that should print all the ID's of people in my JSON files stored in elasticsearch. But I only get ten results(truncated), as I know that by default only 10 results are shown.</p>
  
  <pre><code>from elasticsearch import Elasticsearch
  import sys
  es = Elasticsearch()
  res = es.search(index="my_docs", body={"query": {"match_all": {}}})
  print("%d documents found" % res['hits']['total'])
  for doc in res['hits']['hits']:
          print (" Doc ID: %s" % (doc['_id']))
  </code></pre>
  
  <p>It says 5000 Documents found but returns 10 ID's only.</p>
  
  <p>What is the way to get all documents' Doc ID's printed from my collection in Elasticsearch?</p>