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Answer Posted / satish m
The Program Global Area or Process Global Area (PGA) is a
memory region that contains
data and control information for a single server process or
a single background process. The
PGA is allocated when a process is created and deallocated
when the process is terminated.
In contrast to the SGA, which is shared by several
processes, the PGA is an area that is used
by only one process. In a dedicated server configuration,
the PGA includes these
components:
• Sort area: Used for any sorts that may be required to
process the SQL statement
• Session information: Includes user privileges and
performance statistics for the session
• Cursor state: Indicates the stage in the processing of the
SQL statements that are
currently used by the session
• Stack space: Contains other session variables
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