PASS GUARANTEED QUIZ 2025 RELIABLE ORACLE 1Z1-084: ORACLE DATABASE 19C PERFORMANCE AND TUNING MANAGEMENT RELIABLE TEST QUESTIONS

Pass Guaranteed Quiz 2025 Reliable Oracle 1z1-084: Oracle Database 19c Performance and Tuning Management Reliable Test Questions

Pass Guaranteed Quiz 2025 Reliable Oracle 1z1-084: Oracle Database 19c Performance and Tuning Management Reliable Test Questions

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Oracle Database 19c Performance and Tuning Management Sample Questions (Q54-Q59):

NEW QUESTION # 54
What is the right time to stop tuning an Oracle database?

  • A. When the allocated budget for performance tuning has been exhausted
  • B. When the I/O is less than 10% of the DB time
  • C. When the buffer cache and library cache hit ratio is above 95%
  • D. When all the concurrency waits are eliminated from the Top 10

Answer: A

Explanation:
The right time to stop tuning an Oracle database is often determined by the point of diminishing returns - when the cost of further tuning (in terms of time, resources, or money) exceeds the performance benefits gained.
This is often related to the budget allocated for performance tuning.
* A (Correct):When the allocated budget for performance tuning has been exhausted, it may be time to stop tuning unless the benefits of further tuning justify requesting additional budget.
* B (Incorrect):Eliminating all concurrency waits from the Top 10 is an unrealistic goal since some waits are inevitable and can occur due to application design, which might not be possible to eliminate completely.
* C (Incorrect):The buffer cache and library cache hit ratio being above 95% does not necessarily indicate that the database is fully optimized. Hit ratios are not reliable indicators of database performance and should not be used as sole criteria to end tuning efforts.
* D (Incorrect):Having I/O less than 10% of DB time is not a definitive indicator to stop tuning. It is essential to consider the overall performance goals and whether they have been met rather than focusing solely on I/O metrics.
References:
* Oracle Database Performance Tuning Guide:Introduction to Performance Tuning
* Oracle Database 2 Day + Performance Tuning Guide:Understanding the Tuning Process


NEW QUESTION # 55
Which application lifecycle phase could be managed reactively?

  • A. Deployment
  • B. Design and development
  • C. Production
  • D. Testing
  • E. Upgrade or migration

Answer: C

Explanation:
The production phase of the application lifecycle is often managed reactively. While proactive measures and performance tuning are essential, unforeseen issues can arise in production that require immediate attention and resolution. Reactive management involves monitoring performance and responding to issues as they occur, ensuring the application maintains acceptable performance levels for end-users.
References
* Oracle Database 19c Performance Tuning Guide - Reactive Tuning


NEW QUESTION # 56
18. The application provider has given full indications regarding the procedure to collect statistics.
To reduce the space used in the SYSAUX tablespace, you want to prevent the optimizer statistics Advisor from running.
Which method will allow you to do this?

  • A. Set the parameter OPTIMIZER_ADAPTIVE_STATISTICS to FALSE.
  • B. Use DBMS STATS.DROP ADVISOR TASK to drop the AUTO_STATS_ADVISOR_TASK task.
  • C. Use DBMS_AUTO_TASK_ADMIN. DISABLE to disable the AUTO_STATS_ADVISOR_TASK task.
  • D. Set the AUTO_STATS_ADVISOR_TASK global statistics preference to FALSE.

Answer: C

Explanation:
The Oracle Optimizer statistics advisor, which is part of the automated tasks framework, can be disabled using the DBMS_AUTO_TASK_ADMIN package. This will prevent it fromrunning and thus reduce space usage in the SYSAUX tablespace.References:
* Oracle Database PL/SQL Packages and Types Reference, 19c


NEW QUESTION # 57
This error occurred more than four hours ago in the database:
ORA-04036 PGA memory used by the instance exceeds PGA_AGGREGATE_LIMIT
You want to know which process and query were at fault.
Which two views should you use for this purpose?

  • A. DBA_HIST_SQLSTAT
  • B. DBA_HIST_PGASTAT
  • C. DBA_HIST_PROCESS_MEM_SUMMARY
  • D. DBA_HIST_ACTIVE_SESS_HISTORY
  • E. DBA_HIST_SQLTEXT

Answer: C,D

Explanation:
To investigate the cause of the ORA-04036 error, which indicates that PGA memory usage exceeds the PGA_AGGREGATE_LIMIT, the appropriate views to consult are DBA_HIST_ACTIVE_SESS_HISTORY and DBA_HIST_PROCESS_MEM_SUMMARY.
* DBA_HIST_ACTIVE_SESS_HISTORY: This view provides historical information about active sessions in the database. It includes details about the SQL executed, the execution context, and the resources consumed by each session. By examining this view, you can identify the specific sessions and SQL queries that were active and potentially consuming excessive PGA memory around the time the ORA-04036 error occurred.
* DBA_HIST_PROCESS_MEM_SUMMARY: This view contains historical summaries of memory usage by processes. It can help in identifying the processes that were consuming a significant amount of PGA memory, leading to the ORA-04036 error. This view provides aggregated memory usage information over time, making it easier to pinpoint the processes responsible for high PGA memory consumption.
Together, these views offer a comprehensive overview of the memory usage patterns and specific queries or processes that might have contributed to exceeding the PGA_AGGREGATE_LIMIT, resulting in the ORA-
04036 error.
References:
* Oracle Database Reference: DBA_HIST_ACTIVE_SESS_HISTORY
* Oracle Database Reference: DBA_HIST_PROCESS_MEM_SUMMARY
* Oracle Database Performance Tuning Guide: Managing Memory


NEW QUESTION # 58
Examine this statement and output:

Which three statements are true?

  • A. Session 8779 may be waiting for a user or application response.
  • B. Both 9822 and 8779 sessions are waiting for operating system resources.
  • C. Session 8779 may be waiting due to a network problem.
  • D. Session 9857 is not waiting.
  • E. Session 9857 waited 1354 seconds for another process, which was also waiting for a transaction to end.
  • F. Session 9822 will always stop waiting if the session that owns the TX enqueue issues a COMMIT statement as session 9822 is the first session in the transaction queue.

Answer: A,C,F

Explanation:
For this SQL statement and output, we can analyze theEVENTcolumn to understand the type of wait:
B: The event "SQL*Net message from client" typically indicates that the session is waiting for a response from the client. This can be due to a network issue, user response, or an application processing delay.
E: The event "SQL*Net message from client" also implies that the session is idle waiting for the client (a user or an application) to send a request to the server. This event usually indicates that the session is not actively working but is instead waiting for the next command.
F: The wait event "enq: TX - row lock contention" suggests that session 9822 is waiting for a row-level lock held by another session. If the holding session issues a COMMIT or ROLLBACK, the lock will be released, and session 9822 will stop waiting. Since this session is experiencing row lock contention, it implies it's waiting for a specific transaction to complete.
References:
* Oracle Database Reference, 19c
* Oracle Wait Events Documentation


NEW QUESTION # 59
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