1Z1-084 EXAM MATERIALS PREPARATION TORRENT - 1Z1-084 LEARNING PREP - EXAMTORRENT

1z1-084 Exam Materials Preparation Torrent - 1z1-084 Learning Prep - ExamTorrent

1z1-084 Exam Materials Preparation Torrent - 1z1-084 Learning Prep - ExamTorrent

Blog Article

Tags: 1z1-084 Exam Topics, 1z1-084 Valid Test Vce Free, New 1z1-084 Test Cost, Download 1z1-084 Demo, Latest 1z1-084 Version

You can become more competitive force in the job hunting market and you can also improve your ability in the process of getting a certificate. 1z1-084 study materials of us will help you get the certificate successfully. With experienced experts to compile 1z1-084 study materials, they are high-quality and accuracy, and you can pass the exam just one time. Moreover, we offer you free demo, and you can have a try before buying 1z1-084 Exam Dumps, so that you can have a better understanding of what you are going to buy.

If you encounter any questions about our 1z1-084 learning materials during use, you can contact our staff and we will be happy to serve for you. Maybe you will ask if we will charge an extra service fee. We assure you that we are committed to providing you with guidance on 1z1-084 quiz torrent, but all services are free of charge. As for any of your suggestions, we will take it into consideration, and effectively improve our 1z1-084 Exam Question to better meet the needs of clients. In the process of your study, we have always been behind you and are your solid backing. This will ensure that once you have any questions you can get help in a timely manner.

>> 1z1-084 Exam Topics <<

Marvelous 1z1-084 Exam Topics, Ensure to pass the 1z1-084 Exam

Learning is just a part of our life. We do not hope that you spend all your time on learning the 1z1-084 certification materials. Life needs balance, and productivity gives us a sense of accomplishment and value. So our 1z1-084 real exam dumps have simplified your study and alleviated your pressure from study. Also, the windows software will automatically generate a learning report when you finish your practices of the 1z1-084 Real Exam dumps, which helps you to adjust your learning plan. It is crucial that you have formed a correct review method. The role of our 1z1-084 test training is optimizing and monitoring your study. Sometimes you have no idea about your problems. So you need our 1z1-084 real exam dumps to promote your practices.

Oracle 1Z0-084 certification exam is an excellent way for experienced professionals to validate their skills and knowledge in Oracle Database 19c performance and tuning management. 1z1-084 exam covers a wide range of topics and requires a thorough understanding of the database architecture and administration. Passing 1z1-084 Exam can lead to new career opportunities and enhance the candidate's job prospects.

Oracle Database 19c Performance and Tuning Management Sample Questions (Q16-Q21):

NEW QUESTION # 16
This error occurred more than four hours ago in the database:
ORA-04036 PGA memory used by the instance exceeds PGA_AGGREGATE_LIMIT
You want to know which process and query were at fault.
Which two views should you use for this purpose?

  • A. DBA_HIST_ACTIVE_SESS_HISTORY
  • B. DBA_HIST_SQLTEXT
  • C. DBA_HIST_PGASTAT
  • D. DBA_HIST_SQLSTAT
  • E. DBA_HIST_PROCESS_MEM_SUMMARY

Answer: A,E

Explanation:
To investigate the cause of the ORA-04036 error, which indicates that PGA memory usage exceeds the PGA_AGGREGATE_LIMIT, the appropriate views to consult are DBA_HIST_ACTIVE_SESS_HISTORY and DBA_HIST_PROCESS_MEM_SUMMARY.
* DBA_HIST_ACTIVE_SESS_HISTORY: This view provides historical information about active sessions in the database. It includes details about the SQL executed, the execution context, and the resources consumed by each session. By examining this view, you can identify the specific sessions and SQL queries that were active and potentially consuming excessive PGA memory around the time the ORA-04036 error occurred.
* DBA_HIST_PROCESS_MEM_SUMMARY: This view contains historical summaries of memory usage by processes. It can help in identifying the processes that were consuming a significant amount of PGA memory, leading to the ORA-04036 error. This view provides aggregated memory usage information over time, making it easier to pinpoint the processes responsible for high PGA memory consumption.
Together, these views offer a comprehensive overview of the memory usage patterns and specific queries or processes that might have contributed to exceeding the PGA_AGGREGATE_LIMIT, resulting in the ORA-
04036 error.
References:
* Oracle Database Reference: DBA_HIST_ACTIVE_SESS_HISTORY
* Oracle Database Reference: DBA_HIST_PROCESS_MEM_SUMMARY
* Oracle Database Performance Tuning Guide: Managing Memory


NEW QUESTION # 17
Examine these statements and output:

What parameter change activates the generation and use of SQL Plan Directives7

  • A. optimizer_features_enable=12.2.0.1
  • B. optimizer_adaptive_statistics = TRUE
  • C. optimizer_adaptive_plans=TRUE
  • D. optimizer_capture_sql_plan_baselines_TRUE
  • E. optimizer_dynamic_sampling=11

Answer: B

Explanation:
The optimizer_adaptive_statistics parameter, when set to TRUE, enables the optimizer to use adaptive statistics, such as SQL Plan Directives, to help improve plans by automatically adjusting them based on the actual execution statistics.
References:
* Oracle Database SQL Tuning Guide, 19c


NEW QUESTION # 18
An Oracle 19c database uses default values for all optimizer initialization parameters.
After a table undergoes partition maintenance, a large number of wait events occur for:
cursor: pin S wait on X
Which command reduces the number of these wait events?

  • A. ALTER SYSTEM SET CURSOR_INVALIDATION = DEFERRED;
  • B. ALTER SYSTEM SET SESSION CACHED CURSORS = 500;
  • C. ALTER SYSTEM SET CURSOR_SPACE_FOR_TIME - TRUE;
  • D. ALTER SYSTEM SET CURSOR_SHARING = FORCE;

Answer: A

Explanation:
The cursor: pin S wait on X wait event suggests contention for a cursor pin, which is associated with mutexes (a type of locking mechanism) that protect the library cache to prevent concurrent modifications.
This issue can often be alleviated by deferring the invalidation of cursors until the end of the call to reduce contention. The correct command to use would be:
* C (Correct): ALTER SYSTEM SET CURSOR_INVALIDATION=DEFERRED; This setting defers the invalidation of dependent cursors until the end of the PL/SQL call, which can reduce the cursor: pin S wait on X wait events.
The other options are incorrect in addressing this issue:
* A (Incorrect): Setting CURSOR_SHARING to FORCE makes the optimizer replace literal values with bind variables. It doesn't address the contention for cursor pins directly.
* B (Incorrect): CURSOR_SPACE_FOR_TIME=TRUE aims to reduce the parsing effort by keeping cursors for prepared statements open. It may increase memory usage but does not directly resolve cursor: pin S wait on X waits.
* D (Incorrect): Increasing SESSION_CACHED_CURSORS caches more session cursors but doesn't necessarily prevent the contention indicated by the cursor: pin S wait on X wait events.
References:
* Oracle Database Reference: CURSOR_INVALIDATION
* Oracle Database Performance Tuning Guide: Reducing Cursor Invalidation


NEW QUESTION # 19
Which two actions can cause invalidation or loss of one or more results in the SQL Query Result Cache?

  • A. Decreasing the value set for RESULT_CACHE_REMOTE_EXPIRATION.
  • B. One or more results were aged out of the result cache.
  • C. A request was made by the RCBG background process in a physical standby database that is opened read only and whose primary has a result cache.
  • D. result_cache_max_size is set dynamically to 0.
  • E. A request was made by the RCBG background of a non-RAC database.

Answer: B,D

Explanation:
The SQL Query Result Cache stores the results of queries and PL/SQL function calls for reuse. However, entries in the result cache can be invalidated or lost under certain conditions:
A: Results can be aged out of the cache when the cache becomes full and new results need to be stored. This process ensures that the cache does not exceed its allocated memory and that it contains the most recently used entries.
B: Setting theRESULT_CACHE_MAX_SIZEparameter to 0 will effectively disable the result cache and all cached results will be lost, as Oracle will no longer allocate any memory to the result cache.
References:
* Oracle Database Performance Tuning Guide, 19c


NEW QUESTION # 20
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. Increasing DB_CACHESIZE to 1 G
  • D. Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 25
  • E. Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 50
  • F. Setting PARALLEL_DEGREE_POLICYAUTO

Answer: C,D

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 # 21
......

Have similar features to the desktop-based exam simulator Contains actual Oracle 1z1-084 practice test that will help you grasp every topic Compatible with every operating system. Does not require any special plugins to operate. Creates a 1z1-084 Exam atmosphere making candidates more confident. Keeps track of your progress with self-analysis and Points out mistakes at the end of every attempt.

1z1-084 Valid Test Vce Free: https://www.examtorrent.com/1z1-084-valid-vce-dumps.html

Report this page