module 3 instance architecture

8/17/2019 Module 3 Instance Architecture

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Module 3:

Instance Architecture


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Overview

Configure a Database Server

Memory Architecture Overview

Memory Areas and Their Functions

Process and Thread Architecture

Controlling Resources in S! Server "##$

Client and RD%MS &nteractions

%ac'ground Processes(Threads and Their Functions


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Configuration of a Server

)sing Configuration Parameters to Allocate and ManageResources

Oracle Configuration

• Use of initialization parameters (init.ora or spfile)

• ALTER SYSTEM, ALTER DATABASE

S! Server Configuration

• Setting server properties sing S!L Server Management St"io

(SSMS)

• T#e role of sp$%onfigre s&stem store" pro%e"re


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Demonstration *+ Configuration Parameters

&n this demonstration you will see how to+

Manage instance configurations throughSSMS,

Manage instance configurations through

T-S! scri.ts,Manage instance configurations throughPowerShell,


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Memory Architecture / Overview

0irtual Memory

Relevance to D%MS

Sharing Data in Memory

)sing Memory &ntelligently to Reduce &(O and 1nhance Performance


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Memory Address S.ace / Oracle

Com.onents of Oracle in Me

Appli%ation %omponents

RDBMS %omponents

SYSTEM GLOBAL AREA

JAVA POOL

LARGE

POOLSTREAMS

POOL

SHARED

POOL

REDO

BUFFERBUFFER

CACHE

Oracle

Process

ServerProcess

ServerProcess

Server

Process

Backgrou!

ProcessPGAPGA PGA

PGA PGA

Automatic Shared Memory Management

Manage" '& SA$Target

Atomati%all& sizes


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S! Server2s Memory Pool and Oracle2s S3A

Oracle S"s#e$ Glo%al Area &SGA'

Buffer Cache Shared Pool

LargePool

JavaPool

RedoBuffers

FixedSGA

StreamsPool

S(L Server Me$or" Pool

Buffer Cache Procedure Cache

Connection

ContextLog Cache System

Structures

CLR osting

Layer


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S! Server Architecture 4S!OS5

Com.onents of S! Server Architecture

• on*+reemptive S%#e"ling

• Memor& Management

6osting Subsystems

Memory Management 7on-Preem.tiveScheduling

S!OS

Memory 7odes

Memory Cler's

Caches

Pools

Memory Ob8ects

Scheduling 7odes

Schedulers

Tas's

9or'er Threads

System Threads

1:ce.tion 6andling Resource Monitoring


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Demonstration "+ Monitoring Memory )sage viaDM02s


Review instance memory via T-S!


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Memory Address S.ace / Com.arison

Memory Allocation in S! Server

D&nami% at

#ig#er level (memor& pool, et%.)

loer level ('ffer %a%#e, pro%e"re %a%#e, et%.)

-e %onfigra'le parameters

Memory Address Range

/*'it (012)

A""ress 3in"oing E0tensions (A3E)

4B

25*'it (025 an" 06A25)

/TB


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Process and Thread-%ased Architecture

+ro%ess * memor& spa%e to prote%t appli%ations

T#rea"s 7

E0e%te %o"e

Allo%ate" time on 8+U

Manage" '& 9perating S&stem

-i'ers are lig#t*eig#t t#rea"s

re"%e %onte0t sit%#ing over#ea"

9ra%le ses pro%esses in Uni0 an" t#rea"s in 3in"os

Bot# 9ra%le an" S!L Server se t#rea"s an" optionall& fi'ers.

Allo%ate t#rea" assignment it# 8+U affinit&


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Resource 3overnor - 3reater Control

Se%rit&+erforman%e

Resor%eAvaila'ilit&

+erforman%eSe%rit&Availa'ilit&

Resor%e


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Oracle Client/Database &nteraction

• Oracle2s two modes of interaction are+• De"i%ate" Server 7 ses a "e"i%ate" server pro%ess per %lient

session

• S#are" Server 7 ses "ispat%#ers an" s#are" server pro%esses

DATA%AS1 Data Files

)S1RS

)ser

Process

)ser

Process

)ser

Process

Client

Client

Client

Re

?

"

;

@

$


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S! Server Client/Database &nteraction

S! Server uses the shared server mode

• -n%tionalit& of t#e "ispat%#er is fa%ilitate" '& t#e netor:er t#rea"

• -n%tionalit& of t#e s#are" server pro%esses '& t#e or:er t#rea"s

)sers

)serProcess

)ser

Process

)ser

Process

Client

Client

ClientDatabase

%uffer

Cache

Data Files

Relational

1ngine

O!1

D%Storage

1ngine

O.en

Data

Services

9or'er

Thread

9or'er

Thread

9or'er

Thread

Memory

Pools


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Oracle %ac'ground Processes

)S1RS

)serProcess

)ser

Process

)ser

Process

Client

Client

Client

&7STA7C1

DATA%AS1

Atomati% Storage Management

Process

Mo)#or

S"s#e$

Mo)#or

(ueue

Mo)#or

Jo%

(ueue

Eve#

Mo)#or

Recoverer

Trace

*r)#er

Dis.atcher

Shared

Server

Re


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S! Server %ac'ground Processes

)sers

)ser

Process

)ser

Process

)ser

Process

Client

Client

Client

Relational

1ngine

O!1

D%

Storage

1ngine

Data Files

!og

Files

Database

%uffer

Cache

!og

Cache

Database

Cleanu.

9or'er

Thread

!og

9riter

!ay

9riter

9or'er

Thread

Database

Shrin'ing

O.en

Data Services

Memory

Pool


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Com.aring %ac'ground Processes

Oracle

Process

Oracle

&dentifier

S! Server

1


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Demonstration @+ 1valuating &nstance Resources


)se Dynamic Management 0iews to see.rocessor usage,


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Review

6ow to configure a database serverMemory Address S.ace of a database server

Memory areas inside Oracle S3A and their S! Servere

module 3 instance architecture

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