【12c-062】OCP 062考試題庫最新考試真題-第23題
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QUESTION 23
Examine the query and its output:
SQL> SELECT REASON, metric_value FROM dba_outstanding_alerts;
REASON METRIC_VALUE
----------------------------------- -------------------
Tablespace [TEST] is [28 perce 28.125
nt] full
Metrics "Current Logons Count" 29
Metrics "Database Time Spent 99.0375405
waiting (%)" is at 99.03754 for
event class "Application"
db_recovery_file_dest_size of 974294967296 bytes is 97.298 used and has 116228096
remaining bytes available.
After 30 minutes, you execute the same query:
SQL> SELECT reason, metric_value FROM dba_outstanding_alerets;
REASON METRIC_VALUE
------------------------------ ---------------
Tablespace [TEST] is [28 percs 28.125
nt] full
What might have caused three of the alerts to disappear?
A. The threshold alerts were cleared and transferred to dba_alert_history.
B. An Automatic Workload Repository (AWR) snapshot was taken before the execution of the second
C. An Automatic Database Diagnostic Monitor (ADDM) report was generated before the execution of t he second query.
D. The database instance was restarted before the execution of t he second query.
Correct Answer:A
Section: (none)
Explanation 有狀態預警顯示在 DBA_OUTSTANDING_ALERTS 中，清空后會轉到
DBA_ALERT_HISTORY。
