单选题In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments. On further investigation, you find that buffe

题目

单选题

In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments. On further investigation, you find that buffer busy waits is caused by contention on data blocks. Which option would you consider first to decrease the wait event immediately?（）

Decreasing PCTUSED

Decreasing PCTFREE

Increasing the number of DBWN process

Using Automatic Segment Space Management (ASSM)

Increasing db_buffer_cache based on the V$DB_CACHE_ADVICE recommendation

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相似问题和答案

第1题：

Identify the two direct sources from where SQL plans can be loaded into the SQL plan baselines.()

A. Cursor cache

B. Stored outline

C. SQL Tuning Set

D. Automatic Workload Repository (AWR) snapshots

参考答案：A, C

第2题：

In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments.On further investigation, you find that buffer busy waits is caused by contention on data blocks.Which option would you consider first to decrease the wait event immediately?（）

A. Decreasing PCTUSED

B. Decreasing PCTFREE

C. Increasing the number of DBWN process

D. Using Automatic Segment Space Management (ASSM)

E. Increasing db_buffer_cache based on the V$DB_CACHE_ADVICE recommendation

参考答案：D

第3题：

You plan to have a larger moving window size for the default system-defined moving window baseline because you want to use the adaptive threshold. Which statement factors in this consideration while increasing the size of the moving window?（）

A. The collection level for the AWR should be set to BASIC

B. The moving window size must be less than Undo Retention

C. The moving window size should be greater than the Automatic Workload Repository (AWR) retention period

D. The moving window size should be equal to or less than the Automatic Workload Repository (AWR) retention period

参考答案：D

第4题：

Which statement is true when Automatic Workload Repository (AWR) baselines are created using baseline templates?（）

A、AWR baselines are always created as repeating baselines.
B、AWR baselines can be created on the basis of two time values.
C、AWR baselines are always created with infinite expiration duration.
D、AWR baselines are always created using the Automatic Workload Repository (AWR) retention period as expiration duration.

正确答案:B

第5题：

Which two statements are true about the Automatic Database Diagnostic Monitor （ADDM）（）

A、The ADDM requires at least four AWR snapshots for analysis.
B、The ADDM runs after each AWR snapshot is collected automatically by MMON.
C、The results of the ADDM analysis are stored in the Automatic Workload Repository （AWR）.
D、The ADDM analysis provides only diagnostic information but does not provide recommendations.
E、The ADDM calls other advisors if required， but does not provide recommendations about the advisors.

正确答案:B,C

第6题：

Which three statements are true about Automatic Workload Repository (AWR)?()

A. All AWR tables belong to the SYSTEM schema.

B. The AWR data is stored in memory and in the database.

C. The snapshots collected by AWR are used by the self-tuning components in the database

D. AWR computes time model statistics based on time usage for activities, which are displayed in the v$SYS time model and V$SESS_TIME_MODEL views.

E. AWR contains system wide tracing and logging information.

参考答案：B, C, E

第7题：

A、The collection level for the AWR should be set to BASIC
B、The moving window size must be less than Undo Retention
C、The moving window size should be greater than the Automatic Workload Repository (AWR) retention period
D、The moving window size should be equal to or less than the Automatic Workload Repository (AWR) retention period

正确答案:D

第8题：

You plan to set up the Automatic Workload Repository (AWR) baseline metric thresholds for a moving window baseline. Which action would you take before performing this task?()

A. Compute the baseline statistics.

B. Take an immediate AWR snapshot.

C. Decrease the window size for the baseline.

D. Decrease the expiration time for the baseline.

参考答案：A

第9题：

Which two statements are true about the Automatic Workload Repository （AWR）（）

A、All AWR tables belong to the SYSTEM schema.
B、The AWR contains systemwide tracing and logging information.
C、The snapshots collected by the AWR are accessible through data dictionary views.
D、The snapshots collected by the AWR are used by self-tuning components in the database.

正确答案:C,D

第10题：

In your database， the STATISTICS_LEVEL initialization parameter is set to BASIC. What is the impact of this setting？（）

A、The optimizer statistics are collected automatically.
B、Only the timed operating system （OS） statistics and plan execution statistics are collected.
C、The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.
D、The snapshots for the Automatic Workload Repository （AWR） are not generated automatically.
E、Snapshots cannot be collected manually by using DBMS_WORKLOAD_REPOSITORY PACKAGE.

正确答案:D

In a recent Automatic Workload Repository (AWR) report for y

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