Oracle Database PGA Architecture

Play an AI-generated podcast conversation about this lesson

Where is the Private SQL Area located in a Dedicated Server Environment?

Shared Pool
Program Global Area (correct)
System Global Area
PGA

What is the purpose of an extent in Oracle?

An extent is a memory area that stores information shared by database processes
An extent is the smallest unit of data storage in Oracle
An extent is a collection of contiguous disk storage blocks used to store a logical storage object like a table or index (correct)
An extent is a non-shared memory region that contains data and control information exclusively for use by an oracle process

Which component of PGA stores information for a parsed SQL statement and runtime memory allocations?

Shared Pool
Runtime Area (correct)
Session Memory
Persistent Area

What is the function of System Global Area (SGA) in Oracle?

SGA is a memory area that stores information shared by database processes and users of the database (C) Signup and view all the answers

What is the total instance PGA composed of?

Individual PGAs (A) Signup and view all the answers

What is stored in a block in Oracle databases?

Data and control information exclusively for use by an oracle process (C) Signup and view all the answers

Which memory structure in the System Global Area (SGA) is responsible for storing redo log information?

Redo Log Buffer (C) Signup and view all the answers

In which type of environment is the private SQL area located in the System Global Area (SGA)?

Shared Server Environment (D) Signup and view all the answers

What is the purpose of Session Memory in Oracle architecture?

Stores session variables and session information (A) Signup and view all the answers

What does PGA stand for in Oracle databases?

Program Global Area (A) Signup and view all the answers

Which memory area is allocated for sort, hash-join, bitmap merge, and bitmap create operations?

SQL Work Area (B) Signup and view all the answers

Which memory component is responsible for storing data dictionary cache in the System Global Area (SGA)?

Shared Pool (B) Signup and view all the answers

What are the components of the System Global Area (SGA) in an Oracle database?

Shared pool, large pool, database buffer cache, redo log buffer (A) Signup and view all the answers

Which background process in Oracle is responsible for process recovery operations upon instance failure?

PMON (C) Signup and view all the answers

Where does the SQL syntax check take place before a query is moved to the System Global Area (SGA)?

PGA (C) Signup and view all the answers

In Oracle, what will happen if a query is not already cached when it is submitted for execution?

Parsing happens and a new execution plan is created by the optimizer (A) Signup and view all the answers

Which process in Oracle is responsible for coordinating distributed transactions?

RECO (D) Signup and view all the answers

To which memory component does a SQL statement create a CURSOR in Oracle?

Private SQL area (B) Signup and view all the answers