OpenSearch/docs/reference/cat/fielddata.asciidoc

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[[cat-fielddata]]
== cat fielddata
`fielddata` shows how much heap memory is currently being used by fielddata
on every data node in the cluster.
[source,shell]
--------------------------------------------------
% curl '192.168.56.10:9200/_cat/fielddata?v'
id host ip node total body text
c223lARiSGeezlbrcugAYQ myhost1 10.20.100.200 Jessica Jones 385.6kb 159.8kb 225.7kb
waPCbitNQaCL6xC8VxjAwg myhost2 10.20.100.201 Adversary 435.2kb 159.8kb 275.3kb
yaDkp-G3R0q1AJ-HUEvkSQ myhost3 10.20.100.202 Microchip 284.6kb 109.2kb 175.3kb
--------------------------------------------------
Fields can be specified either as a query parameter, or in the URL path:
[source,shell]
--------------------------------------------------
% curl '192.168.56.10:9200/_cat/fielddata?v&fields=body'
id host ip node total body
c223lARiSGeezlbrcugAYQ myhost1 10.20.100.200 Jessica Jones 385.6kb 159.8kb
waPCbitNQaCL6xC8VxjAwg myhost2 10.20.100.201 Adversary 435.2kb 159.8kb
yaDkp-G3R0q1AJ-HUEvkSQ myhost3 10.20.100.202 Microchip 284.6kb 109.2kb
% curl '192.168.56.10:9200/_cat/fielddata/body,text?v'
id host ip node total body text
c223lARiSGeezlbrcugAYQ myhost1 10.20.100.200 Jessica Jones 385.6kb 159.8kb 225.7kb
waPCbitNQaCL6xC8VxjAwg myhost2 10.20.100.201 Adversary 435.2kb 159.8kb 275.3kb
yaDkp-G3R0q1AJ-HUEvkSQ myhost3 10.20.100.202 Microchip 284.6kb 109.2kb 175.3kb
--------------------------------------------------
The output shows the total fielddata and then the individual fielddata for the
`body` and `text` fields.