Comment 4 for bug 1623809

I also check how it works without server groups and behaviour also was consisten:

Spawning instances without server group:
+----------------+-----------+-----------+-----------------------------+
|quota_instances | min_count | max_count | number of spawned instances |
+================+===========+===========+=============================+
| 10 | 3 | 4 | 4 |
+----------------+-----------+-----------+-----------------------------+
| 10 | 3 | 11 | 10 |
+----------------+-----------+-----------+-----------------------------+
| 10 | 3 | - | 3 |
+----------------+-----------+-----------+-----------------------------+
| 10 | 11 | - |Quota exceeded for instances:|
| | | |Requested 11, but already |
| | | |used 0 of 10 instances |
+----------------+-----------+-----------+-----------------------------+
| 10 | - | 3 | 3 |
+----------------+-----------+-----------+-----------------------------+