Free Oracle 1Z0-084 Exam Practice Questions
Oracle Database 19c: Performance Management and Tuning
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Oracle 1Z0-084 Exam Sample Questions & Answers
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?
Examine this command:
What is the maximum number of baselines generated by this command that you can have at any given time?
Database performance has degraded recently.
index range scan operations on index ix_sales_time_id are slower due to an increase in buffer gets on sales table blocks.
Examine these attributes displayed by querying DBA_TABLES:
Now, examine these attributes displayed by querying DBA_INDEXES:
Which action will reduce the excessive buffer gets?
Which two statements are true about Data Pump import for objects that used the in Memory (IM) column store in their source database?
An Oracle 19c database uses default values for all optimizer initialization parameters.
After a table undergoes partition maintenance, a large number of wait events occur for:
cursor: pin S wait on X
Which command reduces the number of these wait events?
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