elasticsearch性能问题

请问一下大家的es吃cpu吗，我40G数据，用了2台16核32G的机器，压到250的QPS，cpu就飙到80了，再继续压就压不上去了。
具体的信息在下面，请问大家有什么问题吗，或者有什么排查的方向吗？

es服务是使用的aws云服务
压测的工具是jmeter，通过http接口访问es
查询条件如下：

{

    "query": {

      "multi_match": {

          "query" : "WE67K-600t/4000 CNC hydraulic press brake machine for railway",

          "fields" : ["title","categories"],

          "type" : "most_fields"

      }

    },

    "size": 10

}

mappings如下：

{

  "settings": {

    "number_of_shards" :   4,

    "number_of_replicas" : 1,

    "analysis": {

      "filter": {

        "my_synonym_filter": {

          "type": "synonym", 

          "synonyms": [ 

            "apple, cellphones"

          ]

        }

      },

      "analyzer": {

        "my_synonyms": {

          "tokenizer": "standard",

          "filter": [

            "lowercase",

            "stop",

            "kstem",

            "my_synonym_filter" 

          ]

        }

      }

    }

  },

  "mappings": {

    "spu" : {

      "properties" : {

        "spuId" : {

          "type" :   "keyword"

        },

        "title": {

          "type": "text",

          "analyzer": "my_synonyms"

        },

        "categories" : {

          "type" :    "text",

          "analyzer": "my_synonyms"

        },

        "salePrice" : {

          "type" :   "double"

        },

        "originalPrice" : {

          "type" :   "double"

        },

        "discount" : {

          "type" :   "double"

        },

        "score" : {

          "type" :   "double"

        },

        "votes" : {

          "type" :   "integer"

        },

        "sales1" : {

          "type" :   "integer"

        },

        "sales7" : {

          "type" :   "integer"

        },

        "sales30" : {

          "type" :   "integer"

        },

        "sales90" : {

          "type" :   "integer"

        },

        "sales180" : {

          "type" :   "integer"

        },

        "sales360" : {

          "type" :   "integer"

        },

        "wishes" : {

          "type" :   "integer"

        },

        "currency" : {

          "type" :   "keyword"

        },

        "brand" : {

          "type" :    "text",

          "analyzer": "standard"

        },

        "country" : {

          "type" :   "keyword"

        },

        "status" : {

          "type" :   "integer"

        },

        "createTime" : {

          "type" :   "date"

        },

        "updateTime" : {

          "type" :   "date"

        },

        "provider" : {

          "type" :   "keyword"

        },

        "providerSpuId" : {

          "type" :   "keyword"

        },

        "providerUrl" : {

          "type" :   "keyword"

        },

        "seller" : {

          "type" :   "text",

          "analyzer": "standard",

          "boost": 0

        },

        "sellerHash" : {

          "type":    "integer"	

        }

      }

    }

  }

}



[size=13]

[/size]