How to change default value size parameter of the terms aggregation?

Question

By default, the terms aggregation returns the top ten terms with the most documents. How to change default value of the size parameter of terms aggregation?

Elasticsearch 7.12.0

Kibana 7.12.0

Answer 1

That's an easy one to find in the official documentation but you can change the default number of buckets in a terms aggregation using the size parameter:

GET /_search
{
  "aggs": {
    "genres": {
      "terms": { 
        "field": "genre",
        "size": 20                 <--- change this
      }
    }
  }
}