This setting is only used with the forcemerged filtertype.

- filtertype: forcemerged
  max_num_segments: 2
  exclude: True

The value for this setting is the cutoff number of segments per shard. Indices which have this number of segments per shard, or fewer, will be actionable depending on the value of exclude, which is True by default for the forcemerged filter type.

There is no default value. This setting must be set by the user or an exception will be raised, and execution will halt.