Administrare Oracle 9i Suport de curs January 29, 2019

Ziua 3 Administrare Oracle I January 29, 2019

Administrare Oracle 9i Arhitectura Server Oracle January 29, 2019

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

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

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

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

Administrare Oracle 9i January 29, 2019

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

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

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

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

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

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

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

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

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

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

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

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

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

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