你可能感興趣的試題

You work as a database administrator for Certkiller .com. You find that the database performance degrades while you backup the Certkiller database using Recovery Manager （RMAN）. The Certkiller database is running in shared server mode. The database instance is currently using 60% of total operating system memory. You suspect the shared pool fragmentation to be the reason.
Which action would you consider to overcome the performance degradation？（）

A.Configure Java Pool to cache the java objects.
B.Configure Streams Pool to enable parallel processing.
C.Increase Shared Pool size to cache more PL/SQL objects.
D.Increase Database Buffer Cache size to increase cache hits.
E.Configure Large Pool to be used by RMAN and shared server.
F.Increase the total System Global Area （SGA） size to increase memory hits.

單項選擇題

You work as a database administrator for Certkiller .com. You started the instance using theinit.orafile. You have two control files and three redo log groups in your database. You decided to protect the database against failures by adding one more control file. Which file is the appropriate way to perform this task？（）

A.Shut down the instance， copy the control file to the third location and open the database.
B.Abort the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.
C.Copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile， restart the instance and open the database.
D.Shut down the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.
E.Shut down the instance， startup in the mount state， copy the control file to the third location， modify the CONTROL_FILES parameter ininit.oraand open the database.