The System Monitor (SMON) process is one of the essential background processes in an Oracle database. It plays a crucial role in ensuring the database operates smoothly by handling a variety of tasks related to system maintenance and recovery. Below is an overview of the SMON process and its key functions: The System Monitor (SMON) process is one of the essential background processes in an Oracle database. It plays a crucial role in ensuring the database operates smoothly by handling a variety of tasks related to system maintenance and recovery. Below is an overview of the SMON process and its key functions: - Instance Recovery - Cleaning Temporary Segments - Coalescing Free Space - Database Recovery Tasks - Dictionary Management - Offlining Unused Temporary Segments - Rolling Back Dead Transactions The system monitor process (SMON) performs many database maintenance tasks, including the following: - Creates and manages the temporary tablespace metadata and reclaims space from orphaned temporary segments. - Maintains the undo tablespace by onlining, offlining, and shrinking the undo segments based on undo space usage Statistics. - Cleans up the data dictionary when it is in a transient and inconsistent state. - Maintains the system change number (SCN) to time mapping table that is used to support Oracle Flashback features.