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?
Redo logs have nothing to do with transactions. They are there for recovering your database in the event of a crash or an OS file corruption. If you don't have redo logging on, then if anything goes wrong with the database your users will lose all their work since the last good back up.
Normally we would only want to disable logging on a tablespace prior to a bulk data load. The first action after that load would be to take a backup and then re-enable logging. Not logging in a transactional system is a very bad idea.