导读：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 b
转自:
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 onnewbackground 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
