1. Administrare Oracle 9i Suport de curs
January 29, 2019

2. Ziua 3 Administrare Oracle I
January 29, 2019

3. Administrare Oracle 9i Arhitectura Server Oracle
January 29, 2019

4. Administrare Oracle 9i Arhitectura Server Oracle - SGA
SGA – Shared Global Area – zona de memorie comuna tuturor proceselor Oracle.
Shared Pool (min 16MB/64MB-64bit)
LC – Library Cache
Dictionary Data
Buffer Cache (52MB) – db_block
Large Pool
Java Pool
Redolog Buffer
- Memoria este alocata in granule 4-16MB
January 29, 2019

5. Administrare Oracle 9i Arhitectura Server Oracle - PGA
PGA – Private Global Area – zona de memorie privata proceselor de tip server Oracle.
Private SQL Area
Session Memory
SQL Work Area
January 29, 2019

6. Administrare Oracle 9i Arhitectura Server Oracle – Procese Oracle
January 29, 2019

7. Administrare Oracle 9i Arhitectura Server Oracle – Procese Oracle
DatabaseWriter (DBW0 or DBWn)
Log Writer (LGWR)
Checkpoint (CKPT)
System Monitor (SMON)
Process Monitor (PMON)
Archiver (ARCn)
Recoverer (RECO)
Lock Manager Server (LMS) - Real Application Clusters only
Queue Monitor (QMNn)
Dispatcher (Dnnn)
Server (Snnn)
January 29, 2019

8. Administrare Oracle 9i
January 29, 2019

9. Administrare Oracle 9i Arhitectura Server Oracle – Structura Fizica
Structura Fizica – Fisiere in sistemul de fisiere sau RAW
Fisiere de initializare init.ora, spfile.ora
Fisiere de Control
Fisiere Redolog
Fisiere de Date
Fisiere Temporare
Fisiere Undo ( RollBack)
January 29, 2019

10. Administrare Oracle 9i Arhitectura Server Oracle – Structura Logica
Structura Logica – La nivelul utilizatorilor Sql
Block de Date
Extent
Segment
Tablepace
January 29, 2019

11. Administrare Oracle 9i Arhitectura Server Oracle – Structura Logica
January 29, 2019

12. Administrare Oracle 9i Arhitectura Server Oracle – Shutdown instance
January 29, 2019

13. Administrare Oracle 9i Arhitectura Server Oracle – Startup
Startup nomount
Startup mount
Startup
Startup Force
Startup Restricted
Startup mount pfile=‘/opt/oracle/admin/pfile/init.ora’;
Alter database open
January 29, 2019

14. Administrare Oracle 9i Arhitectura Server Oracle – Fisier Initializare
Pfile – fisier text de initalizare (init$SID.ora)
Spfile – fisier binar de initalizare (spfile$SID.ora)
Locatia default: $ORACLE_HOME/dbs
Ordinea in care oracle cauta dupa fisierul de initializare:
spfile$SID.ora
spfile.ora
init$SID.ora
Init.ora
January 29, 2019

15. Administrare Oracle 9i Arhitectura Server Oracle – Fisier Initializare 2
Create spfile from pfile
Alter system set time_statistics=TRUE scope=memory|spfile|both;
Alter system set undo_tablespace=undo2 scope=spfile;
Select * from v$parameter;
Show parameter …
January 29, 2019

16. Administrare Oracle 9i Arhitectura Server Oracle – Fisiere Dump
Alert LOG – fisier foarte important de log a bazei de date
Destinatia: Backgroud_dump_dest din init.ora
Evenimente:
startup/shutdown
Non-default init parameters
Errors…
January 29, 2019

17. Administrare Oracle 9i Arhitectura Server Oracle – Fisier Initializare 2
Alti parametrii:
User_dump_dest
Core_dump_dest
Shared_pool_size=200M
DB_Cache_Size=200M
Large_Pool_Size=16M
Java_Pool_Size=20M
Etc….
January 29, 2019

18. Administrare Oracle 9i Arhitectura Server Oracle – Checkpoint
Checkpoint – se asigura ca toate blocurile de date mai vechi de un interval de timp sunt scrise pe disk.
Checkpoint
-partial – update doar controlfile
- Full – update controlfile si headere datafile (shutdown, alter system checkpoint, altele…).
Blocarea Accesului:
Alter system enable restricted session;
Alter system kill session ‘SID,SERIAL#’;
January 29, 2019

19. Administrare Oracle 9i Arhitectura Server Oracle – Fisiere de Control
Fisiere binare de marime mica folosite pentru controlul bazei de date.
Marimea fisierelor de control este determinata la crearea bazei de date: Maxlogfiles, MaxDatafiles, MaxInstances, etc
Zona fixa si o zona reutilizabila circular pentru RMAN.
Contine toate informatiile importante din baza de date: DB Name, SID, Tablespaces, fisiere de date, seq redolog, informatie checkpoint,etc.
Maxim 8 fisiere de Control (Multiplexate), care trebuie specificate in fisierul de initializare.
January 29, 2019

20. Administrare Oracle 9i Arhitectura Server Oracle – Fisiere de Control
Mutare/Adaugare fisiere de control
Shutdown immediate
Copy control01.ctl control02.ctl
Modifica pfile controlfiles=(“…”)
Startup
In cazul in care se foloseste spfile -> trebuie
Alter system set control_files=‘…’ scope=spfile;
Shutdown…
January 29, 2019

21. Administrare Oracle 9i Arhitectura Server Oracle – Fisiere RedoLog
January 29, 2019

22. Administrare Oracle 9i Arhitectura Server Oracle – Fisiere RedoLog
Alter database add logfile group 3 (‘……’,’…….’) size 20M;
Alter database add logfile member ‘……..’ to group 1;
Alter database drop logfile group 3; ( not current!!!!)
Alter database drop logfile member ‘……’;
January 29, 2019