使用弹性搜索的术语聚合中的准确文档计数

Question

我需要术语聚合的确切计数，我看到了弹性搜索 is not always accurate。我想知道是否有另一种解决方案来克服这个限制。

Answer 1

可以在聚合查询中设置size为0:

{
  "aggs" : {
    "products" : {
        "terms" : {
            "field" : "product",
            "size" : 0
        }
    }
  }
}

但是根据文档：

It is possible to not limit the number of terms that are returned by setting size to 0. Don’t use this on high-cardinality fields as this will kill both your CPU since terms need to be return sorted, and your network.

使用弹性搜索的术语聚合中的准确文档计数

Accurate document counts in terms aggregations with elastic search

count

elasticsearch

document

aggregation