Determines how often slots are compacted. With smaller values, less RAM is used while indexing, and searches on unoptimized indices are faster, but indexing speed is slower. With larger values, more RAM is used during indexing, and while searches on unoptimized indices are slower, indexing is faster. Thus larger values (greater than 10) are best for batch index creation, and smaller values (lower than 10) for indices that are interactively maintained.

A size setting type which sets the minimum size for the lowest level slots. Slots below this size are considered to be on the same level (even if they vary drastically in size) and will be merged whenever there are mergeFactor for them. This effectively truncates the "long tail" of small slots that would otherwise be created into a single level. If you set this too large, it can greatly increase the merging cost during indexing (if you flush many small slots).

A size setting type which sets the largest slot that may be merged with other segments.