ORACLE DATABASE 19C PERFORMANCE AND TUNING MANAGEMENT VALID EXAM PREPARATION & 1Z1-084 LATEST LEARNING MATERIAL & ORACLE DATABASE 19C PERFORMANCE AND TUNING MANAGEMENT TEST STUDY PRACTICE

Oracle Database 19c Performance and Tuning Management Valid Exam Preparation & 1z1-084 Latest Learning Material & Oracle Database 19c Performance and Tuning Management Test Study Practice

Oracle Database 19c Performance and Tuning Management Valid Exam Preparation & 1z1-084 Latest Learning Material & Oracle Database 19c Performance and Tuning Management Test Study Practice

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Oracle 1Z0-084 Exam is a certification that portrays a professional's skills and knowledge in performance tuning and management of the Oracle Database 19c. A candidature that passes the exam validates their proficiency in managing and tuning the Oracle Database to maximize its efficiency and performance. Oracle Database 19c Performance and Tuning Management certification also enhances the candidate's credibility and job prospects in a highly competitive job market. Oracle Database 19c Performance and Tuning Management certification exam is ideal for professionals seeking to advance their career to higher levels of responsibility in database administration, development, and management roles in enterprises worldwide.

Oracle 1Z0-084 certification exam is a valuable credential for professionals seeking to prove their expertise in managing the performance and tuning of Oracle Database 19c. It demonstrates their ability to optimize the performance of the database and ensure that it runs smoothly and efficiently. Oracle Database 19c Performance and Tuning Management certification also shows that they understand how to identify and resolve performance issues quickly and effectively.

Oracle 1Z0-084 exam covers various topics related to database performance and tuning, including database architecture and configuration, SQL tuning, memory and storage management, performance monitoring and troubleshooting, and database security. 1z1-084 Exam is intended for database administrators, developers, and IT professionals who are responsible for managing and maintaining Oracle databases. Candidates are required to have a solid understanding of Oracle Database 19c architecture, features, and functionality before taking 1z1-084 exam.

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Oracle Database 19c Performance and Tuning Management Sample Questions (Q42-Q47):

NEW QUESTION # 42
A database instance is suffering poor I/O performance on two frequently accessed large tables.
No Big Table caching occurs in the database.
Examine these parameter settings:

Which are two actions either one of which will allow Big Table caching to occur?

  • A. Setting PARALLEL_DEGREE_POLICYADAPTIVE
  • B. Setting DB_KEEP_CACHE_SIZE to at least 50M
  • C. Setting PARALLEL_DEGREE_POLICYAUTO
  • D. Increasing DB_CACHESIZE to 1 G
  • E. Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 25
  • F. Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 50

Answer: D,E

Explanation:
Big Table caching is a feature that allows frequently accessed large tables to be cached in memory to improve I/O performance. From the parameter settings provided, Big Table caching is not occurring because DB_BIG_TABLE_CACHE_PERCENT_TARGET is set to 10, which is the minimum threshold for enabling the feature, but the size of the cache is too small for the big tables to be effectively cached.
To enable Big Table caching, one of the following actions could be taken:
* C (Correct): Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 25. This action would allocate a larger percentage of the buffer cache for storing big tables, which could allow for caching large tables and thus improve I/O performance.
* D (Correct): Increasing DB_CACHE_SIZE to 1G. Since the size of the buffer cache is a determining factor for how much data can be cached, increasing this parameter would provide more memory space for big tables to be cached.
Options A, B, E, and F will not enable Big Table caching because:
* A: Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to 50 without adjusting the overall size of the cache might still not be sufficient if the DB_CACHE_SIZE is not large enough to hold the big tables.
* B: Setting DB_KEEP_CACHE_SIZE to at least 50M only specifies a separate buffer pool for objects with the KEEP cache attribute and does not affect Big Table caching.
* E: and F: Changing the PARALLEL_DEGREE_POLICY to ADAPTIVE or AUTO influences the behavior of parallel execution but does not directly enable or influence Big Table caching.
References:
* Oracle Database Performance Tuning Guide: Big Table Caching
* Oracle Database Reference: DB_BIG_TABLE_CACHE_PERCENT_TARGET
* Oracle Database Reference: DB_CACHE_SIZE


NEW QUESTION # 43
Which two options are part of a Soft Parse operation?

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

Answer: E


NEW QUESTION # 44
Which procedure gathers statistics that are always used in the generation of any execution plan?

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

Answer: D

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 # 45
What are the least elevated values of statistics_level and C0NTR0LJ4ANAGEMENT_PACK_ACCESS that allow the usage of Monitoring of Database Operations?

  • A. STATISTICS_LEVEL=BASIC and CONTROL_MANAGEMENT_PACK ACCESS=DIAGOSTIC
  • B. STATISTICS_LEVEL=TYPICAL and CONTROL_MANAGEMENT_PACK_ACCESS=DIAGOSTIC
  • C. STATISTICS_LEVEL=ALL and
    CONTROL_MANAGEMENT_PACK_ACCESS=DIAGOSTIC+TUNING
  • D. STATISTICS_LEVEL=TYPICAL and
    CONTROL_MANAGEMENT_PACK_ACCESS-DIAGOSTIC*TUNING

Answer: C

Explanation:
Monitoring of Database Operations requires that theSTATISTICS_LEVELparameter be set toALLand CONTROL_MANAGEMENT_PACK_ACCESSbe set toDIAGNOSTIC+TUNING. These settings enable all the advisory features and automatic tuning features within the Oracle Database, including the Automatic Workload Repository (AWR), Automatic Database Diagnostic Monitor (ADDM), and the full functionality of the SQL Tuning Advisor and SQL Access Advisor, which are components of the Diagnostic and Tuning packs.
* STATISTICS_LEVEL=ALL:This setting enables the collection of all system statistics for problem detection and self-tuning purposes.
* CONTROL_MANAGEMENT_PACK_ACCESS=DIAGNOSTIC+TUNING:This grants access to both the Diagnostic Pack and the Tuning Pack, which are essential for detailed performance monitoring and tuning capabilities.
References:
* Oracle Database Reference:STATISTICS_LEVEL
* Oracle Database Licensing Information User Manual:Oracle Database Management Packs


NEW QUESTION # 46
What is the right time to stop tuning an Oracle database?

  • A. When all the concurrency waits are eliminated from the Top 10
  • B. When the allocated budget for performance tuning has been exhausted
  • C. When the I/O is less than 10% of the DB time
  • D. When the buffer cache and library cache hit ratio is above 95%

Answer: B

Explanation:
The right time to stop tuning an Oracle database is often determined by the point of diminishing returns - when the cost of further tuning (in terms of time, resources, or money) exceeds the performance benefits gained.
This is often related to the budget allocated for performance tuning.
* A (Correct):When the allocated budget for performance tuning has been exhausted, it may be time to stop tuning unless the benefits of further tuning justify requesting additional budget.
* B (Incorrect):Eliminating all concurrency waits from the Top 10 is an unrealistic goal since some waits are inevitable and can occur due to application design, which might not be possible to eliminate completely.
* C (Incorrect):The buffer cache and library cache hit ratio being above 95% does not necessarily indicate that the database is fully optimized. Hit ratios are not reliable indicators of database performance and should not be used as sole criteria to end tuning efforts.
* D (Incorrect):Having I/O less than 10% of DB time is not a definitive indicator to stop tuning. It is essential to consider the overall performance goals and whether they have been met rather than focusing solely on I/O metrics.
References:
* Oracle Database Performance Tuning Guide:Introduction to Performance Tuning
* Oracle Database 2 Day + Performance Tuning Guide:Understanding the Tuning Process


NEW QUESTION # 47
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