单项选择题
You find today’s performance of your production database to be the best ever. Therefore， you want to be notified in the future whenever the performance degrades by 10% of today’s performance. What is the first step that you would take to ensure this？（）
A.create baseline metrics for today’s performance
B.write the current database metrics to a database table and create a trigger to compare with future database statistics
C.write the current database metrics to a flat file and create an operating script to compare with future database statistics
D.write the current database metrics to a database table and create a procedure to compare with future database statistics
E.write the current database metrics to a database table and submit a job using DBMS_JOB to compare with future database statistics
相关考题
-
多项选择题
Youstartedalongtransaction.Beforecommitting，youexecutedaqueryononeofthetablescurrentlybeingmodified.Youreceivedthefollowingerror：ORA-01555：snapshottoooldHowwouldyoupreventsuchanerrorinthefuture？（）
A.guarantee undo retention
B.add one more redo log group
C.size the redo log files appropriately
D.size the UNDO tablespace appropriately
E.size the SYSTEM tablespace appropriately
F.configure an appropriate undo retention interval
G.change automatic undo management to manual -
单项选择题
When you try to open your database， you receive the following error： ORA-00205： error in identifying control file Where would you find the details required to resolve this error？（）
A.audit trail
B.alert log file
C.user trace file
D.online trace file
E.background trace file
F.operating system event viewer -
单项选择题
OneoftheusersinthePRODdatabase，Adams，complainsthathisupdateonthetable，TRANS，istakinganunusuallylongtimetocomplete.YoufindthatthetablegetslockedbyanotherdatabaseuserbeforeAdamsstartshistransactions，andyouareunabletocontacttheuserholdingthetablelock.AsAdamsisupdatingsomecrucialrowsinthetable，heshouldgetthehighestpriority.Whichmethodwouldyouusetoovercomethisproblem？（）
A.execute the command， ALTER SESSION KILL ..， to kill the blocking session
B.execute the DBMS_SESSION.KILL_SESSION procedure to kill the blocking session
C.execute the command， ALTER SYSTEM KILL SESSION ..， to kill the blocking session
D.execute the command， ALTER SESSION UNLOCK ..， to release the lock for the blocking session
E.execute the command， ALTER SYSTEM UNLOCK SESSION ..， to release the lock for the blocking session
