type count

curl 'localhost:9200/logstash-2015.09.01/_search?search_type=count&pretty' -d '{
    "facets": {
      "count_by_type": {
        "terms": {
          "field": "_type"
        }}}}'
    {
      "took" : 5,
      "timed_out" : false,
      "_shards" : {
        "total" : 1,
        "successful" : 1,
        "failed" : 0
      },
      "hits" : {
        "total" : 1473,
        "max_score" : 0.0,
        "hits" : [ ]
      },
      "facets" : {
        "count_by_type" : {
          "_type" : "terms",
          "missing" : 0,
          "total" : 1473,
          "other" : 0,
          "terms" : [ {
            "term" : "logs",
            "count" : 962
          }, {
            "term" : "syslog",
            "count" : 511
          } ]
        }
      }
    }