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Using the _size field

In order to enable the _size field, set the mapping as follows:

 PUT my-index-000001 { "mappings": { "_size": { "enabled": true } } }

The value of the _size field is accessible in queries, aggregations, scripts, and when sorting. It can be retrieved using the fields parameter:

 # Example documents PUT my-index-000001/_doc/1 { "text": "This is a document" } PUT my-index-000001/_doc/2 { "text": "This is another document" } GET my-index-000001/_search { "query": { "range": { "_size": { "gt": 10 } } }, "aggs": { "sizes": { "terms": { "field": "_size", "size": 10 } } }, "sort": [ { "_size": { "order": "desc" } } ], "fields": ["_size"], "script_fields": { "size": { "script": "doc['_size']" } } }
  1. Querying on the _size field
  2. Aggregating on the _size field
  3. Sorting on the _size field
  4. Use the fields parameter to return the _size in the search response.
  5. Uses a script field to return the _size field in the search response.
Using _size in Kibana

To use the _size field in Kibana, update the metaFields setting and add _size to the list of meta fields. metaFields can be configured in Kibana from the Advanced Settings page in Management.