ORACLE VALID 1Z1-084 EXAM REVIEW: ORACLE DATABASE 19C PERFORMANCE AND TUNING MANAGEMENT - TRAININGDUMPS SPEND YOUR LITTLE TIME AND ENERGY TO PREPARE

Oracle Valid 1z1-084 Exam Review: Oracle Database 19c Performance and Tuning Management - TrainingDumps Spend your Little Time and Energy to prepare

Oracle Valid 1z1-084 Exam Review: Oracle Database 19c Performance and Tuning Management - TrainingDumps Spend your Little Time and Energy to prepare

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Oracle 1Z0-084 exam is divided into four main sections that cover a wide range of topics. The first section, Oracle Database Performance Tuning Concepts, covers the basics of Oracle Database 19c performance tuning architecture, memory, and storage management. The second section, Database Resource Management, covers topics such as the automatic database diagnostic monitor, Oracle database time model, and the Resource Manager.

Passing the Oracle 1Z0-084 exam is a great accomplishment for any IT professional, as it demonstrates their ability to manage and optimize the performance of Oracle Database 19c. Certification in this area is highly valued by employers and can lead to better job opportunities and higher salaries. Studying for the exam requires a strong understanding of database performance tuning concepts and extensive hands-on experience with Oracle Database 19c.

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Oracle Database 19c Performance and Tuning Management Sample Questions (Q34-Q39):

NEW QUESTION # 34
Which two types of performance problems are reported by ADDM for PDBS?

  • A. User I/O waits
  • B. I/O capacity limits
  • C. Excessive checkpoint writes
  • D. Top SQL statements
  • E. SGA sizing issues

Answer: A,B

Explanation:
The Automatic Database Diagnostic Monitor (ADDM) analyzes and reports on various types of performance problems. For Pluggable Databases (PDBs), it can identify issues such as I/O capacity limits which may hinder the overall performance by causing bottlenecks. Additionally, ADDM can report on user I/O waits, which can indicate performance issues related to the time it takes for user queries to read data from the disk.
References:
* Oracle Multitenant Administrator's Guide, 19c
* Oracle Database Performance Tuning Guide, 19c


NEW QUESTION # 35
Which three statements are true about using the in Memory (IM) column store?

  • A. It does not improve performance for queries using cached results of function evaluations on columns from the same table.
  • B. It does not require all database data to fit in memory to improve query performance.
  • C. It does not improve performance for queries that use join groups on columns from different tables.
  • D. It improves performance for queries joining several tables using bloom filter joins.
  • E. It does not improve performance for queries using user-defined virtual column results.
  • F. It can improve OLTP workload performance by avoiding the use of indexes.

Answer: B,D,F

Explanation:
The Oracle In-Memory (IM) column store feature enhances the performance of databases by providing a fast columnar storage format for analytical workloads while also potentially benefiting OLTP workloads.
* C (True): It can improve OLTP workload performance by providing a faster access path for full table scans and reducing the need for indexes in certain scenarios, as the In-Memory store allows for efficient in-memory scans.
* E (True): The In-Memory column store does not require all database data to fit in memory. It can be used selectively for performance-critical tables or partitions, and Oracle Database will manage the population and eviction of data as needed.
* F (True): In-Memory column store can significantly improve performance for queries joining several tables, especially when bloom filters are used, as they are highly efficient with the columnar format for large scans and join processing.
The other options provided are not correct in the context of the In-Memory column store:
* A (False): While In-Memory column store is designed for analytical queries rather than caching results of function evaluations, it does not specifically avoid improving performance for queries using cached results of function evaluations.
* B (False): In-Memory column store can improve the performance of queries that use join groups, which can be used to optimize joins on columns from different tables.
* D (False): In-Memory column store can improve the performance of queries using expressions, including user-defined virtual columns, because it supports expression statistics which help in optimizing such queries.
References:
* Oracle Database In-Memory Guide: In-Memory Column Store in Oracle Database
* Oracle Database In-Memory Guide: In-Memory Joins
* Oracle Database In-Memory Guide: In-Memory Aggregation


NEW QUESTION # 36
Examine these commands, which execute successfully:

Which statement is true?

  • A. AWR snapshots can be purged manually in pluggable databases.
  • B. AWR- snapshots in all pluggable databases will be purged automatically after every 60 mins.
  • C. AD DM is enabled for all pluggable databases.
  • D. ADDM, AWR, and ASH reports can be purged automatically.

Answer: A

Explanation:
The DBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHOT_SETTINGS procedure allows
setting attributes related to AWR snapshots. While the interval setting controls the frequency of snapshot generation, purging them is a separate process that can be managed either automatically (with retention settings) or manually.References:
* Oracle Database PL/SQL Packages and Types Reference, 19c
* Oracle Multitenant Administrator's Guide, 19c


NEW QUESTION # 37
Examine these commands, which execute successfully:

Which statement is true?

  • A. AWR- snapshots in all pluggable databases will be purgedautomatically after every 60 mins.
  • B. AWR snapshots can be purged manually in pluggable databases.
  • C. AD DM is enabled for all pluggable databases.
  • D. ADDM, AWR, and ASH reports can be purged automatically.

Answer: B

Explanation:
TheDBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHOT_SETTINGSprocedure allows setting attributes related to AWR snapshots. While the interval setting controls the frequency of snapshot generation, purging them is a separate process that can be managed either automatically (with retention settings) or manually.References:
* Oracle Database PL/SQL Packages and Types Reference, 19c
* Oracle Multitenant Administrator's Guide, 19c


NEW QUESTION # 38
Examine this statement and output:

Which two situations can trigger this error?

  • A. The user lacks the required privileges to execute the DBMS WORKLOAD CAPTURE package or the directory.
  • B. The syntax is incomplete.
  • C. The capture directory is part of the root file system.
  • D. There is a file in the capture directory.
  • E. The instance is unable to access the capture directory.

Answer: A,E

Explanation:
The ORA-15505 error indicates that the instance encountered errors while trying to access the specified directory. This could be due to:
A: Insufficient privileges: The user attempting to start the workload capture might not have the required permissions to execute the DBMS_WORKLOAD_CAPTURE package or to read/write to the directory specified.
E: Accessibility: The database instance may not be able to access the directory due to issues such as incorrect directory path, directory does not exist, permission issues at the OS level, or the directory being on a file system that's not accessible to the database instance.
References:
* Oracle Database Error Messages, 19c
* Oracle Database Administrator's Guide, 19c


NEW QUESTION # 39
......

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