i created a temporary tablespace without setup autoextent to one.

later on, i
alter database tempfile 'mytempfile' autoextend on ;

i query dba_temp_file.
it tells me increment_by is 1.


what does that mean? why 1?

then i
alter database tempfile 'mytempfile' autoextend on next 10m.
and query dba_temp_files again.
it gives me 1280 for increment_by.


if increment by is the number temp file will extend.
then what will happen if i didn't give the value for next,
how much will oracle extend, 1*8k?