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What is Program Global Area (PGA)?

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What is Program Global Area (PGA)?

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A Program Global Area (PGA) is a memory buffer that is allocated for each individual database session and it contains session specific information such as SQL statement data or buffers used for sorting. D value specifies D total memory allocated by all sessions, and changes will take effect as new sessions are started.

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A Program Global Area (PGA) is a memory buffer that is allocated for each individual database session and it contains session specific information such as SQL statement data or buffers used for sorting. The value specifies the total memory allocated by all sessions, and changes will take effect as new sessions are started.

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The Program Global Area (PGA) is a region in the memory that stores data and control information for a server process. It is created and utilized exclusively by a server process. The PGA consists of a private SQL area and the session memory. Private SQL area – It stores data such as bind information and runtime memory structures such as stacks. The private area is configured for a session as soon as a SQL statement is issued in the session. The private area of a cursor has two components: • Persistent area – It stores the bind information and is only released when the cursor is closed. • Run-time area – It is released only when the execution is completed. The run-time area is created upon receiving the request for execution. For complex queries, a separate area called the SQL work area is configured out of the run-time area. The private area is configured within the PGA when the dedicated server option is chosen. However, if the shared server option is chosen, a part of the private are

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