Oracle Database 19c Performance and Tuning Management - 1Z0-084 Exam Practice Test
A database supporting a mixed workload is hosted on a server with 64 CPUs.
A large number of free buffer waits and buffer busy waits occur affecting performance.
The buffer cache size was then increased but after a few hours, the same wait events occur more often than before the change.
Examine these parameter settings:
Which two actions can help reduce the number of these waits7
A large number of free buffer waits and buffer busy waits occur affecting performance.
The buffer cache size was then increased but after a few hours, the same wait events occur more often than before the change.
Examine these parameter settings:
Which two actions can help reduce the number of these waits7
Correct Answer: A,B
Vote an answer
Explanation: Only visible for Fast2test members. You can sign-up / login (it's free).
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 Plan Baseline but forget to disable the SQL Profile and a few days later you find out that the SQL Profile is generating a new execution plan.
Which two statements are true?
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 Plan Baseline but forget to disable the SQL Profile and a few days later you find out that the SQL Profile is generating a new execution plan.
Which two statements are true?
Correct Answer: A,C
Vote an answer
Explanation: Only visible for Fast2test members. You can sign-up / login (it's free).
Which two statements are true about the use and monitoring of Buffer Cache Hit ratios and their value in tuning Database I/O performance?
Correct Answer: D,E
Vote an answer
Which application lifecycle phase could be managed reactively?
Correct Answer: D
Vote an answer
Explanation: Only visible for Fast2test members. You can sign-up / login (it's free).
You manage a 19c database with default optimizer settings.
This statement is used extensively as subquery in the application queries:
SELECT city_id FROM sh2.sales WHERE city_id=:Bl
You notice the performance of these queries is often poor and, therefore, execute:
SELECT city_id,COUNT(*) FROM sh2.sales GROUP BY city_id;
Examine the results:
There is no index on the CITY_ID column.
Which two options improve the performance?
This statement is used extensively as subquery in the application queries:
SELECT city_id FROM sh2.sales WHERE city_id=:Bl
You notice the performance of these queries is often poor and, therefore, execute:
SELECT city_id,COUNT(*) FROM sh2.sales GROUP BY city_id;
Examine the results:
There is no index on the CITY_ID column.
Which two options improve the performance?
Correct Answer: C,E
Vote an answer
Explanation: Only visible for Fast2test members. You can sign-up / login (it's free).
Examine this statement and output:
Which three statements are true?
Which three statements are true?
Correct Answer: C,E,F
Vote an answer
Explanation: Only visible for Fast2test members. You can sign-up / login (it's free).