READ Free Dumps For Oracle- 1z0-060
| Question ID 20778 | The following parameter are set for your Oracle 12c database instance:
OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES=FALSE
OPTIMIZER_USE_SQL_PLAN_BASELINES=TRUE
You want to manage the SQL plan evolution task manually. Examine the following steps:
1. Set the evolve task parameters.
2. Create the evolve task by using the DBMS_SPM.CREATE_EVOLVE_TASK function.
3. Implement the recommendations in the task by using the DBMS_SPM.IMPLEMENT_EVOLVE_TASK function.
4. Execute the evolve task by using the DBMS_SPM.EXECUTE_EVOLVE_TASK function.
5. Report the task outcome by using the DBMS_SPM.REPORT_EVOLVE_TASK function.
Identify the correct sequence of steps:
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| Option A | 2, 4, 5
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| Option B | 2, 1, 4, 3, 5
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| Option C | 1, 2, 3, 4, 5
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| Option D | 1, 2, 4, 5
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| Option F | * Evolving SQL Plan Baselines
Real 21
Oracle 1z0-060 Exam
2. Create the evolve task by using the DBMS_SPM.CREATE_EVOLVE_TASK function. This function creates an advisor task to prepare the plan evolution of one or
more plans for a specified SQL statement. The input parameters can be a SQL handle, plan name or a list of plan names, time limit, task name, and description.
1. Set the evolve task parameters.
SET_EVOLVE_TASK_PARAMETER
This function updates the value of an evolve task parameter. In this release, the only valid parameter is TIME_LIMIT.
4. Execute the evolve task by using the DBMS_SPM.EXECUTE_EVOLVE_TASK function. This function executes an evolution task. The input parameters can be
the task name, execution name, and execution description. If not specified, the advisor generates the name, which is returned by the function.
3: IMPLEMENT_EVOLVE_TASK
This function implements all recommendations for an evolve task. Essentially, this function is equivalent to using ACCEPT_SQL_PLAN_BASELINE for all
recommended plans. Input parameters include task name, plan name, owner name, and execution name.
5. Report the task outcome by using the DBMS_SPM_EVOLVE_TASK function. This function displays the results of an evolve task as a CLOB. Input parameters
include the task name and section of the report to include.
Reference: Oracle Database SQL Tuning Guide 12c, Managing SQL Plan Baselines
Real 22 Oracle 1z0-060 Exam
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| Correct Answer | B |
Explanation
| Question ID 20779 | 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?
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| Option A | Decreasing PCTUSED
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| Option B | Decreasing PCTFREE
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| Option C | Increasing the number of DBWN process
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| Option D | Using Automatic Segment Space Management (ASSM)
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| Option E | Increasing db_buffer_cache based on the V$DB_CACHE_ADVICE recommendation
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| Correct Answer | D |
Explanation * Automatic segment space management (ASSM) is a simpler and more efficient way of managing space within a segment. It completely eliminates any need to specify and tune the pctused,freelists, and freelist groups storage parameters for schema objects created in the tablespace. If any of these attributes are specified, they are ignored. * Oracle introduced Automatic Segment Storage Management (ASSM) as a replacement for traditional freelists management which used one-way linked-lists to manage free blocks with tables and indexes. ASSM is commonly called "bitmap freelists" because that is how Oracle implement the internal data structures for free block management. Note: * Buffer busy waits are most commonly associated with segment header contention onside the data buffer pool (db_cache_size, etc.). * The most common remedies for high buffer busy waits include database writer (DBWR) contention tuning, adding freelists (or ASSM), and adding missing indexes.