Get field data cache information

GET /_cat/fielddata/{fields}
GET /_cat/fielddata

Get the amount of heap memory currently used by the field data cache on every data node in the cluster.

Important

cat APIs are only intended for human consumption using the command line or Kibana console. They are not intended for use by applications. For application consumption, use the nodes stats API.

Authentication

Api key

Authorization: <value>

Elasticsearch APIs support key-based authentication. You must create an API key and use the encoded value in the request header. For example:

		curl -X GET "${ES_URL}/_cat/indices?v=true" \
  -H "Authorization: ApiKey ${API_KEY}"

To get API keys, use the /_security/api_key APIs.

Basic

Authorization: Basic <credentials>

Bearer

Authorization: Bearer <token>

Elasticsearch APIs support the use of bearer tokens in the Authorization HTTP header to authenticate with the API. For examples, refer to Token-based authentication services

A successful response from GET /_cat/fielddata?v=true&fields=body&format=json. You can specify an individual field in the request body or URL path. This example retrieves heap memory size information for the body field.

[
  {
    "id": "Nqk-6inXQq-OxUfOUI8jNQ",
    "host": "127.0.0.1",
    "ip": "127.0.0.1",
    "node": "Nqk-6in",
    "field": "body",
    "size": "544b"
  }
]

Get field data cache information

Required authorization

Authentication

Path parameters

Query parameters

Response