Oracle background processes are essential components of the database instance. They handle tasks behind the scenes to ensure data integrity, performance, and recovery.
- Background processes are part of the Oracle instance, alongside memory structures (SGA and PGA).
- In multitenant environments, these processes are shared across pluggable databases (PDBs), with some memory management possible at the PDB level.
Here is a little overview to assist in getting to know background processes:
Note: PMON also registers database services with listeners. Server processes, not background processes handle the load into buffer caches.
A simple quiz might help our understanding:
https://www.flexiquiz.com/SC/N/5436c732-23f0-4eaa-ae17-7796d985d27d
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