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Test Oracle 1z1-084 Dumps & Latest 1z1-084 Learning Materials

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This product is enough to get ready for the 1z1-084 test on the first attempt. Three formats are easy to use and meet the needs of every Oracle Database 19c Performance and Tuning Management (1z1-084) test applicant. The Oracle 1z1-084 practice material's three formats are Desktop practice test software, web-based practice exam, and PDF.

Candidates who pass the Oracle 1Z0-084 exam will be able to demonstrate their expertise in performance and tuning management of Oracle Database 19c. They will be able to use various performance tuning tools and techniques to optimize database performance and ensure smooth operation. They will also be able to identify performance issues and implement solutions to improve database performance.

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Oracle 1Z0-084 exam consists of 60 multiple-choice questions that must be completed within 105 minutes. 1z1-084 Exam is highly focused on performance and tuning management, and the questions are designed to test the candidate's ability to identify and troubleshoot performance issues in an Oracle database. Successful completion of this certification exam demonstrates a candidate's proficiency in database performance and tuning management, making them a valuable asset to any organization that uses Oracle database 19c. Oracle Database 19c Performance and Tuning Management certification is recognized globally and can greatly enhance a professional's career opportunities and earning potential.

Oracle Database 19c Performance and Tuning Management Sample Questions (Q38-Q43):

NEW QUESTION # 38
Which procedure gathers statistics that are always used in the generation of any execution plan?

A. DBMS_STATS.GATHER_SYSTEM_STATS
B. DBMS_STATS.GATHER_DATABASE_STATS
C. DBMS_STATS.GATHER_DICTIONARY_STATS
D. DBMS_STATS.GATHER_FIXED_ OBJECTS_STATS

Answer: B

Explanation:
TheDBMS_STATS.GATHER_DATABASE_STATSprocedure is used to gather statistics for all schema objects in the database that do not have up-to-date statistics. These statistics are essential for the optimizer to make informed decisions about the most efficient way to execute a query. The procedure collects statistics such as table and column statistics, index statistics, and system statistics, which are all used in the execution plan generation.
References:
* Oracle Database PL/SQL Packages and Types Reference, 19c
* Oracle Database Performance Tuning Guide, 19c

NEW QUESTION # 39
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?

A. Re-create the SALES table using the columns in IX_SALES_TIME_ID as the hash partitioning key.
B. Partition index IX_SALES_TIME_ID using hash partitioning.
C. Re-create the SALES table sorted in order of index IX_SALES_TIME_ID.
D. Re-create index IX_SALES_TIME_ID using ADVANCED COMPRESSION.

Answer: D

Explanation:
Given that index range scan operations on IX_SALES_TIME_ID are slower due to an increase in buffer gets, the aim is to improve the efficiency of the index access. In this scenario:
* B (Correct): Re-creating the index using ADVANCED COMPRESSION can reduce the size of the index, which can lead to fewer physical reads (reduced I/O) and buffer gets when the index is accessed, as more of the index can fit into memory.
The other options would not be appropriate because:
* A (Incorrect): Re-creating the SALES table sorted in order of the index might not address the issue of excessive buffer gets. Sorting the table would not improve the efficiency of the index itself.
* C (Incorrect): Using the columns in IX_SALES_TIME_ID as a hash partitioning key for the SALES table is more relevant to data distribution and does not necessarily improve index scan performance.
* D (Incorrect): Hash partitioning the index is generally used to improve the scan performance in a parallel query environment, but it may not reduce the number of buffer gets in a single-threaded query environment.
References:
* Oracle Database SQL Tuning Guide: Managing Indexes
* Oracle Database SQL Tuning Guide: Index Compression

NEW QUESTION # 40
Which two statements are true about disabling Automatic Shared Memory Management (ASMM)?

A. It requires a database instance restart to take effect.
B. All auto-tuned SGA components are reset to their original user-defined values.
C. All SGA components excluding fixed SGA and other internal allocations are readjusted immediately after disabling ASMM.
D. Both SGA_TARGET and SGA_MAX_SIZE must be set to zero.
E. The SGA size remains unaffected after disabling ASMM.
F. All SGA components retain their current sizes at the time of disabling.

Answer: E,F

Explanation:
When ASMM is disabled, the sizes of the automatically managed SGA components remain at their current values. ASMM is controlled by theSGA_TARGETparameter. IfSGA_TARGETis set to a non-zero value, ASMM is enabled and Oracle will automatically manage the sizes of the various SGA components. When ASMM is disabled, by settingSGA_TARGETto zero, the SGA components that were automatically sized will retain their current sizes rather than being reset to their original user-defined values. The overall size of the SGA remains the same unless manually changed by modifying individual component sizes or SGA_MAX_SIZE.
References:
* Oracle Database Administration Guide, 19c
* Oracle Database Performance Tuning Guide, 19c

NEW QUESTION # 41
Examine this code block, which executes successfully:
DBMS_SERVER_ALERT. SET_THRESHOLD (
DBMS_SERVER_ALERT.CPU_TIME_PER_CALL, DBMS_SERVER_ALERT. OPERATOR_GE, '8000', DBMS_SERVER_ALERT.OPERATOR_GE, '10000', 1, 2, 'inst1', DBMS_SERVER_ALERT.OBJECT_TYPE_SERVICE, 'main.regress.rdbms.dev.us.example.com') ;

What will happen?

A. A warning alert will be issued only when CPU time exceeds 10000 microseconds for each user call.
B. A critical alert will be issued when CPU time exceeds 10000 microseconds for each user call.
C. A warning alert will be issued when CPU time exceeds 1 minute for each user call.
D. A critical alert will be issued when CPU time exceeds 2 minutes for each user call.

Answer: B

Explanation:
In the provided code block, the DBMS_SERVER_ALERT.SET_THRESHOLD procedure is used to set alert thresholds for the CPU time per call in Oracle Database. This procedure is a part of Oracle's Database Server Alert system, which monitors various metrics and generates alerts when certain thresholds are exceeded.
The parameters passed to the SET_THRESHOLD procedure are as follows:
* The first parameter DBMS_SERVER_ALERT.CPU_TIME_PER_CALL specifies the metric for which the threshold is being set, in this case, the CPU time consumed per database call.
* The second and third parameters DBMS_SERVER_ALERT.OPERATOR_GE and '8000' specify the warning threshold level and its value, respectively. However, these are not relevant to the answer as they are overridden by the critical threshold settings.
* The fourth and fifth parameters DBMS_SERVER_ALERT.OPERATOR_GE and '10000' set the critical threshold level and its value. This means that a critical alert will be generated when the CPU time per call exceeds 10000 microseconds.
* The remaining parameters specify the warning and critical alert intervals, the instance name, the object type, and the service name. These are not directly relevant to the behavior described in the options.
Thus, the correct answer is B, as the critical threshold for CPU time per call is set to 10000 microseconds, and the system is configured to issue a critical alert when this threshold is exceeded.
References:
* Oracle Database 19c documentation on the DBMS_SERVER_ALERT.SET_THRESHOLD procedure, which details the parameters and usage of this procedure for setting alert thresholds within Oracle Database monitoring system.
* Oracle Database Performance Tuning Guide, which provides best practices and methodologies for monitoring and tuning Oracle Database performance, including the use of server alerts and thresholds.

NEW QUESTION # 42
Which two options are part of a Soft Parse operation?

A. Shared Pool Memory Allocation
B. Syntax Check
C. SQL Row Source Generation
D. SQL Optimization
E. Semantic Check

Answer: E

Explanation:
During a soft parse, Oracle checks the shared SQL area to see if an incoming SQL statement matches one already in the shared pool. This operation includes syntax and semantic checks. The syntax check ensures the statement is properly formed, and the semantic check confirms that all the objects referenced in the SQL statement exist and that the user has the necessary privileges to access them.References:
* Oracle Database Concepts, 19c
* Oracle Database SQL Tuning Guide, 19c

NEW QUESTION # 43
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