[DOCS] Added xpack.ml.node_concurrent_job_allocations setting (elastic/x-pack-elasticsearch#3327)
* [DOCS] Added concurrent ML job setting
* [DOCS] Re-ordered ML settings
* [DOCS] Clarified concurrent job allocation setting
Original commit: elastic/x-pack-elasticsearch@c32bc43e861d32b23618c8dd94ece5fe0c93c37c
@@ -56,3 +56,9 @@ this node. If you try to create a job with a `model_memory_limit` property value
that is greater than this setting value, an error occurs. Existing jobs are not
affected when you update this setting. For more information about the
`model_memory_limit` property, see <<ml-apilimits>>.
+
+`xpack.ml.node_concurrent_job_allocations`::
+The maximum number of jobs that can concurrently be in the `opening` state on
+each node. Typically, jobs spend a small amount of time in this state before
+they move to `open` state. Jobs that must restore large models when they are
+opening spend more time in the `opening` state. Defaults to `2`.
