[role="xpack"]
[testenv="platinum"]
[[ml-get-datafeed-stats]]
=== Get {dfeed} statistics API

[subs="attributes"]
++++
<titleabbrev>Get {dfeed} statistics</titleabbrev>
++++

Retrieves usage information for {dfeeds}.

[[ml-get-datafeed-stats-request]]
==== {api-request-title}

`GET _ml/datafeeds/<feed_id>/_stats` +

`GET _ml/datafeeds/<feed_id>,<feed_id>/_stats` +

`GET _ml/datafeeds/_stats`  +

`GET _ml/datafeeds/_all/_stats` 

[[ml-get-datafeed-stats-prereqs]]
==== {api-prereq-title}

* If the {es} {security-features} are enabled, you must have `monitor_ml`,
`monitor`, `manage_ml`, or `manage` cluster privileges to use this API. See
{stack-ov}/security-privileges.html[Security privileges].

[[ml-get-datafeed-stats-desc]]
==== {api-description-title}

You can get statistics for multiple {dfeeds} in a single API request by using a
comma-separated list of {dfeeds} or a wildcard expression. You can get
statistics for all {dfeeds} by using `_all`, by specifying `*` as the
`<feed_id>`, or by omitting the `<feed_id>`.

If the {dfeed} is stopped, the only information you receive is the
`datafeed_id` and the `state`.

IMPORTANT: This API returns a maximum of 10,000 {dfeeds}.

[[ml-get-datafeed-stats-path-parms]]
==== {api-path-parms-title}

`<feed_id>`::
  (Optional, string) Identifier for the {dfeed}. It can be a {dfeed} identifier
  or a wildcard expression. If you do not specify one of these options, the API
  returns statistics for all {dfeeds}.

[[ml-get-datafeed-stats-query-parms]]
==== {api-query-parms-title}

`allow_no_datafeeds`::
  (Optional, boolean) Specifies what to do when the request:
+
--
* Contains wildcard expressions and there are no {datafeeds} that match.
* Contains the `_all` string or no identifiers and there are no matches.
* Contains wildcard expressions and there are only partial matches. 

The default value is `true`, which returns an empty `datafeeds` array when
there are no matches and the subset of results when there are partial matches.
If this parameter is `false`, the request returns a `404` status code when there
are no matches or only partial matches.
--


[[ml-get-datafeed-stats-results]]
==== {api-response-body-title}

The API returns the following information:

`datafeeds`::
  (array) An array of {dfeed} count objects.
  For more information, see <<ml-datafeed-counts>>.

[[ml-get-datafeed-stats-response-codes]]
==== {api-response-codes-title}

`404` (Missing resources)::
  If `allow_no_datafeeds` is `false`, this code indicates that there are no
  resources that match the request or only partial matches for the request. 

[[ml-get-datafeed-stats-example]]
==== {api-examples-title}

The following example gets usage information for the
`datafeed-total-requests` {dfeed}:

[source,js]
--------------------------------------------------
GET _ml/datafeeds/datafeed-total-requests/_stats
--------------------------------------------------
// CONSOLE
// TEST[skip:setup:server_metrics_startdf]

The API returns the following results:
[source,js]
----
{
  "count": 1,
  "datafeeds": [
    {
      "datafeed_id": "datafeed-total-requests",
      "state": "started",
      "node": {
        "id": "2spCyo1pRi2Ajo-j-_dnPX",
        "name": "node-0",
        "ephemeral_id": "hoXMLZB0RWKfR9UPPUCxXX",
        "transport_address": "127.0.0.1:9300",
        "attributes": {
          "ml.machine_memory": "17179869184",
          "ml.max_open_jobs": "20"
        }
      },
      "assignment_explanation": "",
      "timing_stats": {
        "job_id": "job-total-requests",
        "search_count": 20,
        "total_search_time_ms": 120.5
      }
    }
  ]
}
----
// TESTRESPONSE[s/"2spCyo1pRi2Ajo-j-_dnPX"/$body.$_path/]
// TESTRESPONSE[s/"node-0"/$body.$_path/]
// TESTRESPONSE[s/"hoXMLZB0RWKfR9UPPUCxXX"/$body.$_path/]
// TESTRESPONSE[s/"127.0.0.1:9300"/$body.$_path/]
// TESTRESPONSE[s/"17179869184"/$body.datafeeds.0.node.attributes.ml\\.machine_memory/]