Oracle Database PGA Architecture
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Questions and Answers

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?

    <p>SGA is a memory area that stores information shared by database processes and users of the database</p> Signup and view all the answers

    What is the total instance PGA composed of?

    <p>Individual PGAs</p> Signup and view all the answers

    What is stored in a block in Oracle databases?

    <p>Data and control information exclusively for use by an oracle process</p> Signup and view all the answers

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

    <p>Redo Log Buffer</p> Signup and view all the answers

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

    <p>Shared Server Environment</p> Signup and view all the answers

    What is the purpose of Session Memory in Oracle architecture?

    <p>Stores session variables and session information</p> Signup and view all the answers

    What does PGA stand for in Oracle databases?

    <p>Program Global Area</p> Signup and view all the answers

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

    <p>SQL Work Area</p> Signup and view all the answers

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

    <p>Shared Pool</p> Signup and view all the answers

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

    <p>Shared pool, large pool, database buffer cache, redo log buffer</p> Signup and view all the answers

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

    <p>PMON</p> 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)?

    <p>PGA</p> Signup and view all the answers

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

    <p>Parsing happens and a new execution plan is created by the optimizer</p> Signup and view all the answers

    Which process in Oracle is responsible for coordinating distributed transactions?

    <p>RECO</p> Signup and view all the answers

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

    <p>Private SQL area</p> Signup and view all the answers

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