From version 5.0 onward, Watcher is part of X-Pack. For more information, see Alerting on cluster and index events.
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Elastic Docs ›Elasticsearch Watcher [2.4] ›Administering Watcher

Getting Watcher Statistics

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Getting Watcher Statistics

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You use the Watcher stats API to get information about Watcher, such as the current state, number of watches, size of the execution queue, and the watches that are currently queued or executing.

For example:

GET _watcher/stats/_all

The response looks like this:

{
   "watcher_state": "started",
   "watch_count": 2,
   "execution_thread_pool": {
      "queue_size": 1,
      "max_size": 40
   },
   "current_watches": [
     {
       "watch_id": "my_watch",
       "watch_record_id": "my_watch4_223-2015-05-21T11:59:59.811Z",
       "triggered_time": "2015-05-21T11:59:59.811Z",
       "execution_time": "2015-05-21T11:59:59.811Z"
     }
   ],
   "queued_watches": [
     {
       "watch_id": "my_other_watch",
       "watch_record_id": "my_other_watch4_223-2015-05-21T11:59:59.812Z",
       "triggered_time": "2015-05-21T11:59:59.812Z",
       "execution_time": "2015-05-21T11:59:59.812Z"
     }
   ]
}

To get the version of the Watcher plugin you have installed, call GET _watcher.

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