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Oracle 1z1-064 Exam Overview:

Oracle 1z1-064 Exam Syllabus Topics:

Oracle Database 12c: Performance Management and Tuning: Frequently Asked Questions

Oracle Database 12c: Performance Management and Tuning Sample Questions:

Question 1

In your database, the measured 99th percentile value is used as the maximum value. You set a warning threshold level of 110% of maximum trigger as an alert.
What is the outcome? (Choose the best answer.)

A. It generates an error because the warning threshold cannot exceed 100%.
B. It generates an alert when an observed metric is 110% of the 99th percentile value as measured over the moving window baseline.
C. It generates an alert when an observed metric is 99% of the 99th percentile value as measured over the moving window baseline.
D. It generates an alert when 1 in 100 observations for an observed metric exceeds the 99th percentile value as measured over the fixed baseline.
E. It generates an error because the percentage of maximum threshold cannot be set with a significance-level threshold value.

Question 2

Your database supports an OLTP workload.
An application frequently performs update operations on an indexed column of a table; some bulk delete and insert operations are also performed.
The table is created in a locally managed tablespace with manual segment space management.
A user complains about poor response time when querying the table.
The queries mostly perform index range scans.
You notice a high number of buffer busy waits and contention on segment headers.
Which three would you investigate further to diagnose the poor response time?

A. Check for freelist contention.
B. Check table blocks for migrated or chained rows.
C. Check the size of the shared pool.
D. Chick whether the indexes have only a few entries per block.
E. Check the size of the large pool.

Question 3

Which two statements are true about ADDM? (Choose two.)

A. It can analyze performance issues that occurred in past events provided they fall within the AWR retention period.
B. It documents only those components and wait classes that are significantly impacting the performance of the database.
C. It analyzes the performance of a database instance based on the time period covered by the most recent AWR snapshot, and generates recommendations based on hard-coded criteria.
D. It first identifies the performance symptoms, and then refines them to reach the root cause with the singular aim of reducing the DB CPU metric.
E. ADDM resource utilization and cost of analysis depends on the actual load on the database and the number of performance problems analyzed.

Question 4

Which four objectives are achieved by using Resource Manager to manage multiple concurrent user sessions that are competing for resources? (Choose four.)

A. distributing available CPU by allocating percentages of CPU time to different users and applications
B. limiting the number of user sessions allowed to be concurrently active within a group of users
C. limiting the number of parallel executions that can be executed by a user
D. limiting queries based on resource consumption of runaway sessions or calls that consume more than a specified amount of CPU, physical I/O, logical I/O, or elapsed time
E. limiting the number of concurrent sessions for a user
F. limiting the degree of parallelism of any operation performed by members of a group of users

Question 5

Examine the Time Model Statistics section of an AWR report:

Which two inferences can be definitely derived from this section? (Choose two.)

A. The DB CPU time was not spent exclusively for processing SQL statements.
B. All sequence numbers used during this AWR time interval were cached.
C. New child cursors were created because of new bind values or usage of literal values as well as different bind types or sizes.
D. A large number of connected user sessions were idle.
E. The available CPU resources were not utilized to their maximum capacity.

Solutions: