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单选题
You plan to control idle sessions that are blocking other sessions from performing transactions. Your requirement is to automatically terminate these blocking sessions when they remain idle for a specified amount of time. How would you accomplish this task？（）
A
Set metric threshold
B
Implement Database Resource Manager
C
Enable resumable timeout for user sessions
D
Add directives to Automatic Database Diagnostic Monitor （ADDM）
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Set metric thresholdB
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Add directives to Automatic Database Diagnostic Monitor (ADDM)
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考题
单选题You plan to control the sessions performing a huge number of I/O operations. Your requirement is to kill the session when it exceeds a specified number of I/Os. Which statement describes a solution to the above?（）A
Set a threshold for the default system-defined moving window baseline.B
Add directives to the Automatic Database Diagnostic Monitor (ADDM).C
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Implement the database resource manager to add the SWITCH_IO_REQS and SWITCH_GROUP directives.
考题
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A single Control Connection and multiple Sessions(one pers ubscriber)C
Multiple Control Connections and a single SessionD
Multiple Control Connections and multiple Sessions(one per subscriber)
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