1z1-417 무료 덤프문제 온라인 액세스

What are three reasons an implementation of an Oracle Database Performance and Tuning solution is superior to that of scripts or third-party tools?

• A.Results come from the Oracle Database Optimizer and not rules or heuristics trying to predict what theoptimizer may do.
• B.It eliminates the need to reverify compatibility, upgrade third-party tools, or rewrite scripts after a patch ordatabase upgrade.
• C.It is the most inexpensive tool in the market.
• D.It has the largest library of custom scripts and procedures and includes an assembly builder to maintainthem and add more.
• E.It is a part of the database, which means no added installations, configurations, extra user accounts,privilege granting, etc.

Which are two characteristics of "invisible" index functionality that would help tune a database having thousands of legacy indexes?

• A.After an index becomes invisible, it is no longer maintained during insertsand updates.
• B.An index only needs to be rebuilt for it to be visible again.
• C.An invisible index is ignored by the optimizer.
• D.I/O bottlenecks are easy to spot when invisible indexes are used.
• E.The session or system parameter needs to be changed toOPTIMIZER_USE_INVISIBLE_INDEXEStoTRUEfor an invisible index to become visible to the Optimizer.

When preparing a new database installation, you want to ensure automatic collection of timed statistics. Which three configuration parameters are applicable?

• A.ALL_TIMED_STATISTICSparameter set to TRUE
• B.STATISTICS_LEVELparameter set to All
• C.STATISTICS_LEVELparameter set to BASIC.
• D.AUTO_STATSparameter set to TRUE
• E.TIMED_STATISTICSparameter set to true
• F.STATISTICS_LEVEL parameter set to TYPICAL

DBAs are spending an enormous amount of time trying to identify and fix SQL statements they are suspect have regressed as a result of system changes not documented by the Operations Team. What would you implement to resolve this problem?

• A.Oracle SQL Developer, which helps develop and test the SQL prior to putting it into production
• B.SQL Plan Manager which uses system histograms to extrapolate future SQL execution performance
• C.Complete Oracle Enterprise Manager suite
• D.Oracle Database Backup & Recovery
• E.SQL Performance Analyzer which helps predict and prevent SQL execution performance problems causedby environment changes

Instead of a database automatically publishing statistics when statistics collection ends, you want to test queries a satisfactory result before they are made available to the entire database. Which would you configure for that to occur?

• A.SetAUTOMATIC_WORKLOAD_REPOSITORY_COLLECTIONtoPAUSE.
• B.SetOPTIMIZER_USE_PENDING_STATISTICStoTRUE.
• C.Use aHOLD HINTin the SQL.
• D.SetAUTO_UPDATE_STATISTICStoFALSE.