弹性搜索php + mysql无法获得总计数

Question

我在PHP + Mysql中整合弹性搜索。

据我所知，弹性搜索默认只返回10条记录。

以下是我的搜索查询。

 $params = [
            'index' => $this->client->getIndex(),
            'type'  => $this->client->getType(),

            //"scroll" => "1m",

            'body'  => [
            "query" => [
               "bool" => [
                  "must" => [
                     [
                          "multi_match" => [
                              "fields" => ["prod_name", "prod_seo_name"],
                              "type" => "phrase_prefix",
                              "query" => 'samsung'
                          ]
                     ],
                     [
                          "term"=> ["cat_type_id"=>1]
                     ]
                  ]
               ]
            ]
            ],
       ]; 
 $query  = $client->search($params);


    //return  array($this->extractResult($query),$this->extractResult($query1));
    return  $this->extractResult($query);

以上查询在mysql中返回2000+记录但弹性搜索给出10.我可以在弹性搜索中放入'size upto 1000'，但这不会填写要求。如何获取弹性搜索中的总记录数。我想在php中计算分页。