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1: Perform recovery at instance startup.
2: Free the resources used by a user process when it fails.
3: Cleanup the database buffer cache when a process fails.
4: Dynamically register database services with listeners.
5: Monitor sessions for idle session timeout.
6: Cleanup unused temporary segments.
7: Record the checkpoint information in control file.
Which option has the correct functionalities listed for a background process?
A.Checkpoint (CKPT): 1, 2, 5
B.System Monitor (SMON): 1, 6
C.Process Monitor (PMON): 4, 6, 7
D.Database Writer (DBWR): 1, 3, 4
答案:(B)
解析:
1->系统监控进程(SMON)
2->进程监控进程(PMON)
3->进程监控进程(PMON)
4->进程监控进程(PMON)
5->进程监控进程(PMON)
6->系统监控进程(SMON)
7->检查点进程(CKPT)
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