原文地址: https://www.elastic.co/guide/en/elasticsearch/reference/7.7/cat-fielddata.html, 原文档版权归 www.elastic.co 所有
IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
Elasticsearch Guide [7.7] » REST APIs » cat APIs » cat fielddata API
« cat datafeeds API cat health API »

cat fielddata APIedit

Returns the amount of heap memory currently used by fielddata on every data node in the cluster.

Requestedit

GET /_cat/fielddata/<field>

GET /_cat/fielddata

Path parametersedit

<field>
(Optional, string) Comma-separated list of fields used to limit returned information.

Query parametersedit

bytes
(Optional, byte size units) Unit used to display byte values.
format
(Optional, string) Short version of the HTTP accept header. Valid values include JSON, YAML, etc.
h
(Optional, string) Comma-separated list of column names to display.
help
(Optional, boolean) If true, the response includes help information. Defaults to false.
s
(Optional, string) Comma-separated list of column names or column aliases used to sort the response.
v
(Optional, boolean) If true, the response includes column headings. Defaults to false.

Examplesedit

Example with an individual fieldedit

You can specify an individual field in the request body or URL path. The following fieldata API request retrieves heap memory size information for the body field.

GET /_cat/fielddata?v&fields=body

The API returns the following response:

id                     host      ip        node    field   size
Nqk-6inXQq-OxUfOUI8jNQ 127.0.0.1 127.0.0.1 Nqk-6in body    544b

Example with a list of fieldsedit

You can specify a comma-separated list of fields in the request body or URL path. The following fieldata API request retrieves heap memory size information for the body and soul fields.

GET /_cat/fielddata/body,soul?v

The API returns the following response:

id                     host      ip        node    field   size
Nqk-6inXQq-OxUfOUI8jNQ 127.0.0.1 127.0.0.1 Nqk-6in body    544b
Nqk-6inXQq-OxUfOUI8jNQ 127.0.0.1 127.0.0.1 Nqk-6in soul    480b

The response shows the individual fielddata for the body and soul fields, one row per field per node.

Example with all fields in a clusteredit

The following fieldata API request retrieves heap memory size information all fields.

GET /_cat/fielddata?v

The API returns the following response:

id                     host      ip        node    field   size
Nqk-6inXQq-OxUfOUI8jNQ 127.0.0.1 127.0.0.1 Nqk-6in body    544b
Nqk-6inXQq-OxUfOUI8jNQ 127.0.0.1 127.0.0.1 Nqk-6in mind    360b
Nqk-6inXQq-OxUfOUI8jNQ 127.0.0.1 127.0.0.1 Nqk-6in soul    480b
« cat datafeeds API cat health API »