elasticsearch 得到太多结果，需要帮助过滤查询

Question

我在理解 ES 查询系统的底层方面遇到很多问题。

例如，我有以下查询:

{
  "size": 0,
  "query": {
    "bool": {
      "must": [
        {
          "term": {
            "referer": "www.xx.yy.com"
          }
        },
        {
          "range": {
            "@timestamp": {
              "gte": "now",
              "lt": "now-1h"
            }
          }
        }
      ]
    }
  },
  "aggs": {
    "interval": {
      "date_histogram": {
        "field": "@timestamp",
        "interval": "0.5h"
      },
      "aggs": {
        "what": {
          "cardinality": {
            "field": "host"
          }
        }
      }
    }
  }
}

该请求得到太多结果:

"status" : 500, "reason" : "ElasticsearchException[org.elasticsearch.common.breaker.CircuitBreakingException: Data too large, data for field [@timestamp] would be larger than limit of [3200306380/2.9gb]]; nested: UncheckedExecutionException[org.elasticsearch.common.breaker.CircuitBreakingException: Data too large, data for field [@timestamp] would be larger than limit of [3200306380/2.9gb]]; nested: CircuitBreakingException[Data too large, data for field [@timestamp] would be larger than limit of [3200306380/2.9gb]]; "

我已经尝试过这个请求:

{
  "size": 0,
  "filter": {
    "and": [
      {
        "term": {
          "referer": "www.geoportail.gouv.fr"
        }
      },
      {
        "range": {
          "@timestamp": {
            "from": "2014-10-04",
            "to": "2014-10-05"
          }
        }
      }
    ]
  },
  "aggs": {
    "interval": {
      "date_histogram": {
        "field": "@timestamp",
        "interval": "0.5h"
      },
      "aggs": {
        "what": {
          "cardinality": {
            "field": "host"
          }
        }
      }
    }
  }
}

我想过滤数据以获得正确的结果，我们将不胜感激!

Answer 1

我找到了一个解决方案，这有点奇怪。我听从了 dimzak 的建议并清除了缓存:

curl --noproxy localhost -XPOST "http://localhost:9200/_cache/clear"

然后我使用过滤而不是 Olly 建议的查询:

{
  "size": 0,
  "query": {
    "filtered": {
      "query":  {
        "term": {
          "referer": "www.xx.yy.fr"
        }
      },
      "filter" : { 
        "range": {
          "@timestamp": { 
            "from": "2014-10-04T00:00", 
            "to": "2014-10-05T00:00"
          }  
        }
      }
    }
  },
  "aggs": {
  "interval": {
    "date_histogram": {
    "field": "@timestamp",
    "interval": "0.5h"
    },
    "aggs": {
    "what": {
      "cardinality": {
      "field": "host"
      }
    }
    }
  }
  }
}

我不能给你们两个答案，我认为 dimzak 应该得到最好的答案，但对你们两个人竖起大拇指:)