If we disable the 'redo logs' of a tablespace in Oracle, will they impact Hibernate's transactions?
These are the options present in the Oracle EM on a tablespace level:

Enable logging 
Yes 
Generate redo logs for creation of tables, indexes and partitions, and for subsequent inserts. Recoverable 
No 
Redo log entries are smaller, the above operations are not logged and not recoverable. 

Also, is Oracle's commit/rollback functionality dependent upon these redo logs?