opensearch-docs-cn/_api-reference/cat/cat-field-data.md

layout	title	parent	nav_order	has_children	redirect_from
default	CAT field data	CAT API	15	false	/opensearch/rest-api/cat/cat-field-data/

CAT fielddata

Introduced 1.0 {: .label .label-purple }

The CAT fielddata operation lists the memory size used by each field per node.

Example

GET _cat/fielddata?v

{% include copy-curl.html %}

To limit the information to a specific field, add the field name after your query:

GET _cat/fielddata/<field_name>?v

{% include copy-curl.html %}

If you want to get information for more than one field, separate the field names with commas:

GET _cat/fielddata/field_name_1,field_name_2,field_name_3

{% include copy-curl.html %}

Path and HTTP methods

GET _cat/fielddata?v
GET _cat/fielddata/<field_name>?v

URL parameters

All CAT fielddata URL parameters are optional.

In addition to the common URL parameters, you can specify the following parameter:

Parameter	Type	Description
bytes	Byte size	Specify the units for byte size. For example, 7kb or 6gb. For more information, see Supported units.

Response

The following response shows the memory size for all fields as 284 bytes:

id                     host       ip         node       field size
1vo54NuxSxOrbPEYdkSF0w 172.18.0.4 172.18.0.4 odfe-node1 _id   284b
ZaIkkUd4TEiAihqJGkp5CA 172.18.0.3 172.18.0.3 odfe-node2 _id   284b