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Earning the Oracle 1Z0-084 Certification is an excellent way to showcase your knowledge and expertise in the performance tuning of the Oracle Database. Oracle Database 19c Performance and Tuning Management certification demonstrates that you have the necessary skills to maintain an optimal database performance in any situation. Additionally, this certification provides various career opportunities, such as performing the critical role of a Database Performance Analyst or becoming a team leader in developing an application in a high-performance database environment.

Oracle 1Z0-084 Certification Exam validates a candidate's expertise in performance and tuning management for Oracle Database 19c. 1Z0-084 exam is intended for database administrators and professionals who wish to demonstrate their skills in optimizing Oracle Databases to enhance their performance and scalability.

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Oracle 1Z0-084 exam covers a wide range of topics related to performance tuning and management of Oracle Database 19c. 1Z0-084 exam tests the candidate's ability to identify and troubleshoot performance issues, optimize database performance, and implement performance-related features and functionalities. 1Z0-084 Exam also covers topics such as database monitoring, capacity planning, and performance tuning methodologies.

Oracle Database 19c Performance and Tuning Management Sample Questions (Q17-Q22):

NEW QUESTION # 17
SGA_TARGET and PGA_AGGREGATE_TARGET are configured to nonzero values.
MEMORY_target is then set to a nonzero value but memory_MAX_TARGET is not set.
Which two statements are true?

Answer: A,B

Explanation:
When MEMORY_TARGET is set to a nonzero value, Oracle automatically manages the memory allocation between the System Global Area (SGA) and the Program Global Area (PGA). If MEMORY_MAX_TARGET is not explicitly set, Oracle will behave in the following manner:
* MEMORY_MAX_TARGET will default to the value of MEMORY_TARGET, assuming the platform allows for the value of MEMORY_TARGET to be increased dynamically. This means that MEMORY_TARGET represents both the initial allocation and the maximum limit for the dynamically managed memory unless MEMORY_MAX_TARGET is specified differently.
* If MEMORY_TARGET is set to a value that is less than the sum of the current values of SGA_TARGET and PGA_AGGREGATE_TARGET, Oracle will use the higher sum as the default value for MEMORY_MAX_TARGET to ensure that there is adequate memory for both areas. The database instance will not start if MEMORY_TARGET is not sufficient to accommodate the combined SGA and PGA requirements.
References
* Oracle Database Administrator's Guide 19c: Automatic Memory Management
* Oracle Database Performance Tuning Guide 19c: Using Automatic Memory Management

NEW QUESTION # 18
You must produce a consolidated formatted trace file by combining all trace files generated by all clients for a single service.
Which combination of utilities does this?

A. TKPROF and Trace Analyzer
B. Trcsess and TKPROF
C. Trace Analyzer and Tracsess
D. Autotrace and TKPROF

Answer: B

Explanation:
To produce a consolidated formatted trace file from multiple trace files generated by all clients for a single service, the combination oftrcsessandTKPROFutilities is used. Thetrcsessutility consolidates trace files based on specified criteria such as session, client identifier, or service name. This results in a single trace file that combines the desired tracing information. Next,TKPROFis used to format the output of the trace file generated bytrcsess, providing a readable summary of the trace, including execution counts, execution times, and SQL statement text along with execution plans.
Steps:
* Usetrcsessto combine trace files:
* Command:trcsess output=consolidated.trc service=your_service_name *.trc
* UseTKPROFto format the consolidated trace file:
* Command:tkprof consolidated.trc output.txt explain=user/password sys=no sort=prsela,fchela References:
* Oracle Database Performance Tuning Guide, 19c
* Oracle Database Utilities, 19c

NEW QUESTION # 19
The CURS0R_SHARING and OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES parameters are set to default. The top five wait events in an awr report are due to a large number of hard parses because of several almost identical SQL statements.
Which two actions could reduce the number of hard parses?

A. Increase the size of the library cache.
B. Set the CURSOR_SHARING parameter to FORCE.
C. Set OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES to TRUE.
D. Create the KEEP cache and cache tables accessed by the SQL statements.
E. Create the RECYCLE cache and cache tables accessed by the SQL statements.

Answer: A,B

Explanation:
To reduce the number of hard parses due to several almost identical SQL statements, you can take the following actions:
* C (Correct): Increasing the size of the library cache can help reduce hard parses by providing more memory to store more execution plans. This allows SQL statements to be shared more effectively.
* E (Correct): Setting the CURSOR_SHARING parameter to FORCE will cause Oracle to replace literals in SQL statements with bind variables, which can significantly reduce the number of hard parses by making it more likely that similar SQL statements will share the same execution plan.
The other options do not directly impact the number of hard parses:
* A (Incorrect): Creating the KEEP cache and caching tables accessed by the SQL statements can improve performance for those tables, but it does not directly reduce the number of hard parses.
* B (Incorrect): Creating the RECYCLE cache and caching tables accessed by the SQL statements can make it more likely that objects will be removed from the cache quickly, which does not help with hard parse issues.
* D (Incorrect): Setting OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES to TRUE can help stabilize SQL execution plans but will not reduce the number of hard parses. This parameter is used to automatically capture SQL plan baselines for repeatable SQL statements, which can prevent performance regressions due to plan changes.
References:
* Oracle Database Performance Tuning Guide: Minimizing Hard Parses
* Oracle Database SQL Tuning Guide: CURSOR_SHARING

NEW QUESTION # 20
Examine these statements and output:

What parameter change activates the generation and use of SQL Plan Directives7

A. optimizer_dynamic_sampling=11
B. optimizer_adaptive_statistics = TRUE
C. optimizer_features_enable=12.2.0.1
D. optimizer_capture_sql_plan_baselines_TRUE
E. optimizer_adaptive_plans=TRUE

Answer: B

Explanation:
The optimizer_adaptive_statistics parameter, when set to TRUE, enables the optimizer to use adaptive statistics, such as SQL Plan Directives, to help improve plans by automatically adjusting them based on the actual execution statistics.
References:
* Oracle Database SQL Tuning Guide, 19c

NEW QUESTION # 21
You use SQL Tuning Advisor to tune a given SQL statement.
The analysis eventually results in the implementation of a SQL Profile.
You then generate the new SQL Profile plan and enforce it using a SQL PlanBaselinebut forget to disable the SQLProfile and a few days later you find out that the SQL Profile is generating a new execution plan.
Which two statements are true?

A. The conflict between the two plan stability methods results in an error.
B. The execution plan is the one enforced by the SQL Plan Baseline.
C. The existence of two concurrent plan stability methods generates a child cursor for every execution.
D. The execution plan is the one enforced by the SQL Profile.
E. The SQL Profiles as well as SQL Plan Baseline are implemented using hints, so they both generate the same plan.
F. The SQL Plan Baseline must be accepted in order to be used for the execution plan.

Answer: D,F

Explanation:
When both a SQL Profile and a SQL Plan Baseline are in place, the SQL Profile has a stronger preference and the optimizer is more likely to choose the execution plan from the SQL Profile.
C: A SQL Profile is generally more influential than a SQL Plan Baseline because it contains additional statistics and directives that help the optimizer to generate a more efficient execution plan. If both exist, the optimizer will use the profile's plan unless the baseline's plan is proven to be better through the SQL performance monitoring process.
E: SQL Plan Baselines must be accepted before they can be used by the optimizer. If a SQL Plan Baseline is not accepted, it will not be considered for generating the execution plan. Therefore, the presence of an unaccepted SQL Plan Baseline will not automatically force the optimizer to use its plan.
References:
* Oracle Database SQL Tuning Guide, 19c
* Oracle Database Administrator's Guide, 19c

NEW QUESTION # 22
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Choosing the Right Format for Your Oracle 1Z0-084 Questions Preparation with Exams

Latest 1Z0-084 Test Prep, Reliable 1Z0-084 Exam Answers

Oracle Database 19c Performance and Tuning Management Sample Questions (Q17-Q22):

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