Oracle 12c Achitecture

Architecture Diagram VKRM

(Virtual Scheduler for Resource Manager)

MMON

MMAN

RCBG

Mnnn

(Memory Manager)

(Result Cache)

SMCO

(Manageability Monitor)

MMNL

PMON

(Manageability Monitor Lite)

(Process Monitor)

(System Monitor)

(Space Management Coordinator)

Least Recently Used (LRU) List

Library Cache Shared SQL Area

Cold

(Hash value SQL source Execution plan)

RSMN (Remote Slave Monitor)

(SGA Allocator)

(Recovery Process)

Buffer Pools

Flash Buffer Area

Hot

EMNC

GEN0

(EMON Coordinator)

Flash back Buffer

ASH Buffers

DEFAULT flash LRU chain

Large Pool Response Queues

Default

Request Queue Oracle XA Interface Pool

8K

2K

Redo Log Buffer

16 K

Backup / Recovery Operations Private SQL Area (Persistent Area) for Shared servers

32 K

4K

Result Cache

(Lock Process)

Enqueues

ILM bitmap tables

Latches

Other

ges resource

gcs mastership buckets

ges shared global area

gcs resources

ges process array

gcs shadows

ges reserved msg buffers

gcs affinity

RVWR

(Recovery Writer)

(Parallel Query Slaves)

Dnnn

Server

Process

Lnnn

(Pooled Server Process)

LG00 99

(Atomic Control File to Memory Service)

Control Files

(Securefiles)

Streams Pool Java Pool Used Memory Free Memory

Qnnn

(AQ Server Class)

CJQ0 Jnnn

(Job Queue Coordinator)

Fixed SGA

(Redo Transport Slave)

ARCHn

(Archiver Process) n=0..9 or n=a..t

RM

(RAT Masking Slave)

Nnnn

(Connection Broker Process)

Hash Area

User Area (UGA) UserGlobal Global Area

(UGA) Session

Variables

OLAP Pool

Bitmap Merge Area

(Media Management Layer routines) or

Process

Image Copies

Private SQL Area Persistent Area

Runtime Area

or

Redo Log Files

Archived Redo Log

Files

Redo Thread

(Thread Listener)

OCFn

DIA0

(Diagnostic Capture Process)

(ASM CF Connection Pool)

(Diagnostic Process)

Automatic Diagnostic Repository (ADR)

Tape Backup

MARK

(Thread Listener)

DIAG

OSB

(Capture Processing Worker)

(Mark AU for Resynchronization Coordinator)

(Oracle Secure Backup)

SQL Work Areas Sort Area

RPnn

SCMN … SCMN

Change Tracking File

RMAN

Program Global Area (PGA)

Process

Dedicated Server

CTWR

MML

Flash Cache

User

Database Resident Connection Pooling

Server Parameter File

Flash Cache Flash Cache Flash Cache Flash Cache Flash Cache Flash Cache

Listener

Cursor

TT00-zz

(Redo Log Writer)

(Change Tracking Writer)

LREG

(Dispatchers)

PING

(Global Cache Service)

Data & Temp Files

(Listener Registration Process)

(Interconnect Latency Measurement)

(Checkpoint Process)

BW36..99

LGWR

ACMS

Flashback Thread

Shared Server

(Shared Servers)

CKPT

(Database Writer)

(Flashback Data Archiver)

(Transport Monitor)

Flashback Logs

Snnn

QMnn

(AQ Master Class)

31 possible destinations

ges enqueues

Pnnn

DBW0..j

FBDA

TMON

Group

(Global Cache/ Enqueue Heartbeat Monitor)

gcs res hash bucket

Database Area

LMHB

LMS0-Z

Shared I/O Pool

(AQ Process Coordinator)

(Oracle File Server)

Fast Recovery Area

(Global Enqueue Service)

(Global Enqueue Service Monitor)

PX msg pool

Undo

LDD0,Z

LMON

Recycle

(Process Spawner)

AQPC

OFSD

System

LMD0,Z

(RAC Management Process)

Keep

PSP0

Global Resource Directory (RAC Only) ges big msg buffers

RMSn

(Virtual Keeper of TiMe)

Non Default Buffer Pools

KEEP flash LRU chain

Data Dictionary Cache (Row Cache)

LCK0,1

VKTM

(General Task Execution)

Low RBA order

Reserved Pool

IPC0

(Database Resource Manager)

Database Buffer Cache

Checkpoint Queue

User Global Area (UGA) for Shared Server

(IPC Service)

DBRM

SAnn

System Global Area (SGA)

Shared Pool

Wnnn

RECO

SMON

BG Trace File

FG Trace File

Dump File

HM Reports

Incident Packages

Incident Dumps

RBAL

PRnn

(ASM Rebalance Master)

(Parallel Recovery Process)

AR 7

6

Backup Piece

Backup Sets

Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Oracle and Java are registered trademarks of Oracle and/or its affiliates. Other names may be trademarks of their respective owners.

Storage Cloud

Alert Log File

Onnn

(ASM Connection Pool)