Oracle Database 12c中的新进程_pmon background process in oracle database 12c

作者：喵喵爱编程 | 2024-08-16 20:29:36

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pmon background process in oracle database 12c

转自:

New Background Processes In 12c (Doc ID 1625912.1)

APPLIES TO:

Oracle Database - Enterprise Edition - Version 12.1.0.1 and later
Information in this document applies to any platform.

PURPOSE

This article provides information on new background processes introduced in 12c

A complete list of background processes can be found in the Oracle Documentation:
https://docs.oracle.com/database/121/REFRN/GUID-86184690-5531-405F-AA05-BB935F57B76D.htm#REFRN104

DETAILS

* BWnn There can be 1 to 100 Database Writer Processes. The names of the first 36 Database Writer Processes are DBW0-DBW9 and DBWa-DBWz. The names of the 37th through 100th Database Writer Processes are BW36-BW99. The database selects an appropriate default setting for the DB_WRITER_PROCESSES parameter or adjusts a user-specified setting based on the number of CPUs and processor groups.

* FENC (Fence Monitor Process) Processes fence requests for RDBMS instances which are using Oracle ASM instances

* IPC0 (IPC Service Background Process) Common background server for basic messaging and RDMA primitives based on IPC (Inter-process communication) methods.

* LDDn (Global Enqueue Service Daemon Helper Slave) Helps the LMDn processes with various tasks

* LGnn (Log Writer Worker) On multiprocessor systems, LGWR creates worker processes to improve the performance of writing to the redo log. LGWR workers are not used when there is a SYNC standby destination. Possible processes include LG00-LG99.

*LREG (Listener Registration Process) Registers the instance with the listeners

*OFSD (Oracle File Server Background Process) Serves file system requests submitted to an Oracle instance

* RPOP (Instant Recovery Repopulation Daemon) Responsible for re-creating and/or repopulating data files from snapshot files and backup files

* SAnn (SGA Allocator) Allocates SGA The SAnn process allocates SGA in small chunks. The process exits upon completion of SGA allocation.

* SCRB (ASM Disk Scrubbing Master Process) Coordinates Oracle ASM disk scrubbing operations

* SCRn (ASM Disk Scrubbing Slave Repair Process) Performs Oracle ASM disk scrubbing repair operation

* SCVn (ASM Disk Scrubbing Slave Verify Process) Performs Oracle ASM disk scrubbing verify operation

New Background Processes In 12c (Doc ID 1625912.1)

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