[DOCS] Add ML limitation (elastic/x-pack-elasticsearch#1916)
Original commit: elastic/x-pack-elasticsearch@7730810f980a2e3dc6b0eeaf91487ac92410fe2a
@@ -101,12 +101,22 @@ analyzed.
[float]
=== Time-based index patterns are not supported
+//See x-pack-elasticsearch/#1910
It is not possible to create an {xpackml} analysis job that uses time-based
index patterns, for example `[logstash-]YYYY.MM.DD`.
This applies to the single metric or multi metric job creation wizards in {kib}.
+[float]
+=== Fields named "by", "count", or "over" cannot be used to split data
+//See x-pack-elasticsearch/#858
+
+You cannot use the following field names in the `by_field_name` or
+`over_field_name` properties in a job: `by`; `count`; `over`. This limitation
+also applies to those properties when you create advanced jobs in {kib}.
+
+
[float]
=== Jobs created in {kib} use model plot config and pre-aggregated data
//See x-pack-elasticsearch/#844
