Oracle OCP 1Z0 053 Q656(ACKUP_TAPE_IO_SLAVES&pga)

656.The BACKUP_TAPE_IO_SLAVES parameter is set to FALSE for the database instance. Which
statement is true while performing a tape backup in an RMAN session?
A. The tape I/O performed is asynchronous
B. The tape buffer is allocated from the System Global Area (SGA)
C. The tape buffer is allocated from the Program Global Area (PGA)
D. Oracle I/O uses an interrupt mechanism to determine when each I/O completes
Answer: C

為FALSE的時候，tape buffer會從PGA中分配。
TRUE， 從SGA中分配。

http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmtunin.htm#BRADV90074
http://blog.csdn.net/rlhua/article/details/14555973

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