QUESTION 53
View the Exhibit and examine the output of the query in different times when the following command runs in an
RMAN sessions:
RMAN> BACKUP DATABASE FILESPERSET 2;
The database has seven data files. Why is the %_COMPLETE refreshed to 13.59 in the third output after
reaching 88.77?
A. Because the progress is reported for each data file
B. Because the progress is reported for each backup set
C. Because other RMAN sessions have issued the same BACKUP command
D. Because new data files have been added to the database while the RMAN backup is in progress
Answer: B
同631题：http://blog.csdn.net/rlhua/article/details/17260017
Explanation/Reference:
Section: Backup, Recovery & Recovery Manager (RMAN)
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14191/advmaint.htm#i1008347
While the RMAN job is running, start SQL*Plus and connect to the target database, and execute the longops
script to check the progress of the RMAN job.
If you repeat the query while the RMAN job progresses, then you see output such as the following:
SQL> @longops
SID SERIAL# CONTEXT SOFAR TOTALWORK %_COMPLETE
---------- ---------- ---------- ---------- ---------- ----------8 19 1 10377 36617 28.34
SQL> @longops
SID SERIAL# CONTEXT SOFAR TOTALWORK %_COMPLETE
---------- ---------- ---------- ---------- ---------- ----------8 19 1 21513 36617 58.75
SQL> @longops
SID SERIAL# CONTEXT SOFAR TOTALWORK %_COMPLETE
---------- ---------- ---------- ---------- ---------- ----------8 19 1 29641 36617 80.95
If you run the longops script at intervals of two minutes or more and the %_COMPLETE column does not
increase, then RMAN is encountering a problem.
Refer to "Monitoring RMAN Interaction with the MediaManager" on page 23-8 to obtain more information.
If you frequently monitor the execution of long-running tasks, then you could create a shell script orbatch file
under your host operating system that runs SQL*Plus to execute this query repeatedly.