NEW ONLINE 1Z1-084 TESTS PASS CERTIFY | EFFICIENT LATEST 1Z1-084 EXAM DISCOUNT: ORACLE DATABASE 19C PERFORMANCE AND TUNING MANAGEMENT

New Online 1z1-084 Tests Pass Certify | Efficient Latest 1z1-084 Exam Discount: Oracle Database 19c Performance and Tuning Management

New Online 1z1-084 Tests Pass Certify | Efficient Latest 1z1-084 Exam Discount: Oracle Database 19c Performance and Tuning Management

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Oracle Database 19c Performance and Tuning Management Sample Questions (Q49-Q54):

NEW QUESTION # 49
Which three statements are true about tuning dimensions and details of v$sys_time_model and DB time?

  • A. Statspack cannot account for high CPU time when CPU TIME is a Top 10 event in DB time. When CPU time is high, SQL tuning may improve performance.
  • B. When WAIT TIME is high, instance tuning may improve performance.
  • C. The proportion of WAIT TIME to CPU TIME always increases with increased system load.
  • D. DB Time accounts for all time used by background processes and user sessions.
  • E. Parse Time Elapsed accounts for successful soft and hard parse operations only.
  • F. Systems in which CPU time is dominant need more tuning that those in which WAIT TIME is dominant.

Answer: A,B,D

Explanation:
A: Statspack is a performance diagnostic tool that can help identify high CPU usage issues. High CPU time may indicate that SQL statements need to be tuned for better performance.
D: High wait times can often be reduced by instance tuning, such as adjusting database parameters or improving I/O performance.
F: DB Time is a cumulative time metric that includes the time spent by both user sessions and background processes executing database calls.References:
* Oracle Database Performance Tuning Guide, 19c
* Oracle Database Concepts, 19c


NEW QUESTION # 50
Which two Oracle Database features use database services?

  • A. Oracle SQL Tuning Advisor
  • B. Database Resource Manager
  • C. Oracle SQL Performance Management
  • D. Oracle Scheduler
  • E. Oracle Automatic Reoptimization

Answer: B,D

Explanation:
Database services in Oracle are used to manage how resources are allocated and how workloads are managed within the database. The features that use database services are:
* B (Correct):Database Resource Manager (DBRM) uses services to control resource allocation to different workloads. It ensures that resources are assigned to the most critical tasks first, based on the service associated with the workload.
* E (Correct):Oracle Scheduler can also utilize database services. Jobs in Oracle Scheduler can be assigned to different services to control resource allocation and prioritization.
The other features mentioned are related to SQL performance but do not directly utilize database services in the way Resource Manager and Scheduler do:
* A:Oracle Automatic Reoptimization is a feature that allows the database to automatically improve the execution plan of a SQL statement after it is executed, based on the actual performance metrics, but it does not directly use database services.
* C:Oracle SQL Performance Management involves various components of SQL tuning and monitoring, but it does not use database services to operate.
* D:Oracle SQL Tuning Advisor provides advice on how to tune SQL queries for better performance.
While it can be used in conjunction with services for managing and analyzing workloads, it doesn't use services in its core functionality.
References:
* Oracle Database Administrator's Guide:Administering Services
* Oracle Database Administrator's Guide:Managing Resources with Oracle Database Resource Manager
* Oracle Database Scheduler Developer's Guide:Using the Scheduler


NEW QUESTION # 51
Users complain about slowness and session interruptions. Additional checks reveal the following error in the application log:

Which file has additional information about this error?

  • A. Alert log
  • B. ASH report
  • C. Session trace file SQL trace file automatically generated by the error
  • D. SQL trace file automatically generated by the error

Answer: A

Explanation:
When an ORA-00060 deadlock error occurs, detailed information about the error and the deadlock graph are dumped into the alert log. This log contains a trace file name that you can use to find additional detailed information about the sessions involved in the deadlock and the SQL statements they were executing.
References:
* Oracle Database Administrator's Guide, 19c
* Oracle Database Error Messages, 19c


NEW QUESTION # 52
Which two statements are true about disabling Automatic Shared Memory Management (ASMM)?

  • A. It requires a database instance restart to take effect.
  • B. All SGA components retain their current sizes at the time of disabling.
  • C. All auto-tuned SGA components are reset to their original user-defined values.
  • D. All SGA components excluding fixed SGA and other internal allocations are readjusted immediately after disabling ASMM.
  • E. Both SGA_TARGET and SGA_MAX_SIZE must be set to zero.
  • F. The SGA size remains unaffected after disabling ASMM.

Answer: B,F

Explanation:
When ASMM is disabled, the sizes of the automatically managed SGA components remain at their current values. ASMM is controlled by theSGA_TARGETparameter. IfSGA_TARGETis set to a non-zero value, ASMM is enabled and Oracle will automatically manage the sizes of the various SGA components. When ASMM is disabled, by settingSGA_TARGETto zero, the SGA components that were automatically sized will retain their current sizes rather than being reset to their original user-defined values. The overall size of the SGA remains the same unless manually changed by modifying individual component sizes or SGA_MAX_SIZE.
References:
* Oracle Database Administration Guide, 19c
* Oracle Database Performance Tuning Guide, 19c


NEW QUESTION # 53
You need to transport performance data from a Standard Edition to an Enterprise Edition database. What is the recommended method to do this?

  • A. Export the data by using expdp from the ftatspack repository and import it by using impdp into the AWR repository.
  • B. Export the data by using the expdp utility and parameter file spuexp.par from the Statspack repository and import it by using impdp into Export the data by using expdp from the Statspack repository and import it by using impdp into the AWR repository.
  • C. Export the data by using the exp utility and parameter file spuexp.par from the Statspack repository and import it by using imp into a dedicated Statspack schema on the destination.
  • D. Export the data by using expdp from Statspack and import it by using
    $ORACLE_HOME/rdbms/admin/awrload into the AWRrepository.

Answer: C

Explanation:
To transport performance data from an Oracle Database Standard Edition, which uses Statspack, to an Enterprise Edition database, which uses AWR, you must consider the compatibility of data structures and repository schemas between these tools. The recommended method is:
* D (Correct):Export the data using theexputility with a parameter file appropriate for Statspack (like spuexp.par) from the Statspack repository and import it into a dedicated Statspack schema on the destination. Since Statspack and AWR use different schemas, it's not recommended to import Statspack data directly into the AWR repository.
The other options are incorrect because:
* A (Incorrect):expdpis not designed to export from Statspack, andawrloadis intended for loading from an AWR export file, not a Statspack export.
* B (Incorrect):Althoughexpdpandimpdpare used for exporting and importing data, the AWR repository schema is different from the Statspack schema, so importing Statspack data directly into the AWR repository is not recommended.
* C (Incorrect):Usingexpdpto export from Statspack and then importing directly into the AWR repository is not the correct approach due to the schema differences between Statspack and AWR.
References:
* Oracle Database Performance Tuning Guide:Migrating from Statspack to AWR


NEW QUESTION # 54
......

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