64 lines
1.5 KiB
Markdown
64 lines
1.5 KiB
Markdown
---
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layout: default
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title: CAT field data
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parent: CAT API
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nav_order: 15
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has_children: false
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redirect_from:
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- /opensearch/rest-api/cat/cat-field-data/
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---
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# CAT fielddata
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**Introduced 1.0**
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{: .label .label-purple }
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The CAT fielddata operation lists the memory size used by each field per node.
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## Example
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```json
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GET _cat/fielddata?v
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```
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{% include copy-curl.html %}
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To limit the information to a specific field, add the field name after your query:
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```json
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GET _cat/fielddata/<field_name>?v
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```
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{% include copy-curl.html %}
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If you want to get information for more than one field, separate the field names with commas:
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```json
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GET _cat/fielddata/field_name_1,field_name_2,field_name_3
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```
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{% include copy-curl.html %}
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## Path and HTTP methods
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```
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GET _cat/fielddata?v
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GET _cat/fielddata/<field_name>?v
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```
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## URL parameters
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All CAT fielddata URL parameters are optional.
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In addition to the [common URL parameters]({{site.url}}{{site.baseurl}}/api-reference/cat/index), you can specify the following parameter:
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Parameter | Type | Description
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:--- | :--- | :---
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bytes | Byte size | Specify the units for byte size. For example, `7kb` or `6gb`. For more information, see [Supported units]({{site.url}}{{site.baseurl}}/opensearch/units/).
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## Response
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The following response shows the memory size for all fields as 284 bytes:
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```json
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id host ip node field size
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1vo54NuxSxOrbPEYdkSF0w 172.18.0.4 172.18.0.4 odfe-node1 _id 284b
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ZaIkkUd4TEiAihqJGkp5CA 172.18.0.3 172.18.0.3 odfe-node2 _id 284b
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```
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