title: ElasticSearch documentation says not to use scroll for user requests, only for data transformation
body: <p>I'm new to ES and confused by its documentation of scroll.  From the docs "<em>Scrolling is not intended for real time user requests, but rather for processing large amounts of data, e.g. in order to reindex the contents of of one index into a new index with a different configuration</em>".</p>
  
  <p>And yet...further down on the same page it says not to use from() and size() to do pagination because it "<em>is very inefficient</em>".  And on the Java API page describing Search it shows an example of paging via Scroll.</p>
  
  <p>So, assuming I want to present sorted search results, a page at a time, which approach is recommended: from/size or Scrolling?</p>