In Oracle, this happens because uncommitted transactions are found to be committed by a later reader, which cleans them out. https://www.databasejournal.com/or

In Oracle, this happens because uncommitted transactions are found to be committed by a later reader, which cleans them out. https://www.databasejournal.com/oracle/delayed-block-cleanout-in-oracle/ https://www.databasejournal.com/oracle/delayed-block-cleanou...