ElasticSearch caching response?

gistfile1.txt

$ curl http://10.11.0.6:9200/migrations/_settings
{"migrations":{"settings":{"index.number_of_shards":"1","index.auto_expand_replicas":"1-all","index.number_of_replicas":"2"}}}

$ curl http://10.11.0.6:9200/migrations/_settings?pretty=true
{
  "migrations" : {
    "settings" : {
      "index.number_of_shards" : "1",
      "index.auto_expand_replicas" : "0-all",
      "index.number_of_replicas" : "0"
    }
  }
}

$ curl http://10.11.0.6:9200/migrations/_settings
{"migrations":{"settings":{"index.number_of_shards":"1","index.auto_expand_replicas":"1-all","index.number_of_replicas":"2"}}}