The Join component's max-memory parameter defaults to 8388608 bytes (8 MB), which controls the amount of memory available for the join operation. This is the standard default value when not explicitly configured.
8388608 bytes (8 MB, exactly 2^23) is the documented default max-memory setting for the join component in this ETL tool. The other numeric options are either transposed digits or unrelated values, not the actual configured default.