elasticsearch from和size分页查询得不到想要的结果

问题描述：elasticsearch from和size分页查询得不到想要的结果

代码：

#分页
#from就相当于MySQL中limit后面的第一个参数
#from就相当于MySQL中limit后面的第二个参数
GET /my_index/_search
{
  "query": {
    "match_all": {}
  },
  "from": 1,
  "size": 2
}

出错结果：

#①当 from为0时
{
  "took" : 14,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 4,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "my_index",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "id" : 1,
          "title" : "华为笔记本电脑",
          "category" : "华为",
          "images" : "http://www.gulixueyuan.com/xm.jpg",
          "price" : 5388
        }
      },
      {
        "_index" : "my_index",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 1.0,
        "_source" : {
          "id" : 2,
          "title" : "华为手机",
          "category" : "华为",
          "images" : "http://www.gulixueyuan.com/xm.jpg",
          "price" : 5500
        }
      }
    ]
  }
}
②当from为1时
{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 4,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "my_index",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 1.0,
        "_source" : {
          "id" : 2,
          "title" : "华为手机",
          "category" : "华为",
          "images" : "http://www.gulixueyuan.com/xm.jpg",
          "price" : 5500
        }
      },
      {
        "_index" : "my_index",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : 1.0,
        "_source" : {
          "id" : 3,
          "title" : "VIVO手机",
          "category" : "vivo",
          "images" : "http://www.gulixueyuan.com/xm.jpg",
          "price" : 3600
        }
      }
    ]
  }
}