QUESTION 79
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 GlobalArea (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
同656题：http://blog.csdn.net/rlhua/article/details/14555973
Explanation/Reference:
Section: Backup, Recovery & Recovery Manager (RMAN)
http://download.oracle.com/docs/cd/B10501_01/server.920/a96566/rcmtunin.htm#449408
RMAN allocates the tape buffers in the SGA or the PGA, depending on whether I/O slaves are used. If you set
the initialization parameter BACKUP_TAPE_IO_SLAVES = true, then RMAN allocates tape buffers from the
SGA or the large pool if the LARGE_POOL_SIZEinitialization parameter is set. If you set the parameter to
false, then RMAN allocates the buffers from the PGA.