anchor.diff:  curl -XPUT localhost:9200/my_index -d'
   {
     "settings": {
  -    "index.requests.cache.enable": true
  +    "index.requests.cache.enable": false
     }
   }
   '
  
positive.code: but it will cache `hits.total`,  <<search-aggregations,aggregations>>, and
  <<search-suggesters,suggestions>>.
  
  Queries that use `now` (see <<date-math>>) cannot be cached.
  ===================================
  
  [float]
  
negative.code: ------------------------
  
  [float]
  ==== Enabling and disabling caching
  
  The cache is enabled by default, but can be disabled when creating a new
  index as follows:
  
  [source,js]
  