What are the Oracle background processes?
Table of Contents
What are the Oracle background processes?
The background processes in an Oracle instance can include the following: Database Writer Process (DBWn) Log Writer Process (LGWR) Checkpoint Process (CKPT)
What are background process of ASM in Oracle?
• ASMB – ASM Background Process. Communicates with the ASM instance, managing storage and providing statistics. ASMB runs in ASM instances when the ASMCMD cp command runs or when the database instance first starts if the server parameter file is stored in ASM. ASMB also runs with Oracle Cluster Registry on ASM.
What is mandatory background process in Oracle 11g?
This section describes the following mandatory background processes: Process Monitor Process (PMON) System Monitor Process (SMON) Database Writer Process (DBWn)
Which background process is responsible for instance recovery?
This event is called a checkpoint. The checkpoint process signals DBWn, updates the data files and control files of the database, and records the time of this update. The system monitor performs instance recovery when a failed instance is restarted. The process monitor performs a recovery when a user process fails.
What is background process explain?
A background process is a computer process that runs behind the scenes (i.e., in the background) and without user intervention. Typical tasks for these processes include logging, system monitoring, scheduling, and user notification.
What is role of FBDA background process?
Flashback Data Archiver Process (FBDA) is a background process that provides the ability to track and store transactional changes to a table over its lifetime. This way, you can flashback tables back in time to restore the way they were.
What is MMON process in Oracle?
From Oracle FAQ. MMON (Manageability Monitor) is a background process that gathers memory statistics (snapshots) and stores this information in the AWR (automatic workload repository). MMON is also responsible for issuing alerts for metrics that exceed their thresholds. This process was introduced in Oracle 10g.
What is background processing used for?
What is checkpoint background process in Oracle?
The checkpoint process is responsible for signalling DBWn at checkpoints and updating all the datafiles and control files of the database to indicate the most recent checkpoint. System monitor (SMON) The system monitor performs recovery when a failed instance starts up again.
What is the purpose of Smon background process?
SMON (System MONitor) is an Oracle background process created when you start a database instance. The SMON process performs instance recovery, cleans up after dirty shutdowns and coalesces adjacent free extents into larger free extents. SMON wakes up every 5 minutes to perform housekeeping activities.
What happens when Pmon is killed?
If you kill PMON, NOTHING will happen to your database at all.
What is background process example?
Should I close background processes?
While stopping a process using the Task Manager will most likely stabilize your computer, ending a process can completely close an application or crash your computer, and you could lose any unsaved data. It’s always recommended to save your data before killing a process, if possible.
