Summer Special - 65% Discount Offer - Ends in 0d 00h 00m 00s - Coupon code: c4sdisc65

1z0-084 PDF

$38.5

$109.99

3 Months Free Update

  • Printable Format
  • Value of Money
  • 100% Pass Assurance
  • Verified Answers
  • Researched by Industry Experts
  • Based on Real Exams Scenarios
  • 100% Real Questions

1z0-084 PDF + Testing Engine

$61.6

$175.99

3 Months Free Update

  • Exam Name: Oracle Database 19c: Performance Management and Tuning
  • Last Update: Jun 18, 2024
  • Questions and Answers: 55
  • Free Real Questions Demo
  • Recommended by Industry Experts
  • Best Economical Package
  • Immediate Access

1z0-084 Engine

$46.2

$131.99

3 Months Free Update

  • Best Testing Engine
  • One Click installation
  • Recommended by Teachers
  • Easy to use
  • 3 Modes of Learning
  • State of Art Technology
  • 100% Real Questions included

1z0-084 Practice Exam Questions with Answers Oracle Database 19c: Performance Management and Tuning Certification

Question # 6

Which two options are part of a Soft Parse operation?

A.

Syntax Check

B.

SQL Row Source Generation

C.

SQL Optimization

D.

Shared Pool Memory Allocation

E.

Semantic Check

Full Access
Question # 7

Which statement is true about DB time in V$$YS_TIME_MODEL?

A.

DB time is organized as a simple list of statistics and any time period is attributable to only one statistic.

B.

DB time can be many times greater than the elapsed time since the database instance started.

C.

DB tine excludes the time spent waiting for a CPU in the operating system run queue.

D.

DB time includes the time spent executing the RMAN backup and restore command.

Full Access
Question # 8

This error occurred more than four hours ago in the database:

ORA-04036 PGA memory used by theinstance exceedsPGA_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_SQLSTAT

C.

DBA_HIST_SQLTEXT

D.

DBA_HIST_PGASTAT

E.

DBA_HIST_PROCESS_MEM_SUMMARY

Full Access
Question # 9

You need to collect and aggregate statistics for the ACCTG service and PAYROLL module, and execute:

1z0-084 question answer

Where do you find the output of this command?

A.

By viewing V$SERV_MOD_ACT_STATS

B.

In $ORACLE_BASE/diag/rdbms///trace

C.

By viewing V$SERVICE_STATS

D.

In the current working directory

Full Access
Question # 10

Users complain about slowness and session interruptions. Additional checks reveal the following error in the application log:

1z0-084 question answer

Which file has additional information about this error?

A.

Alert log

B.

ASH report

C.

Session trace file SQL trace file automatically generated by the error

D.

SQL trace file automatically generated by the error

Full Access
Question # 11

A Standard Edition production database has performance problems for two hours on the same day each week.

Which tool must you use to diagnose the problem?

A.

SQL Performance Analyzer

B.

AWR Compare Periods report

C.

Database Replay

D.

Statspack report

Full Access
Question # 12

Which two statements are true about the use and monitoring of Buffer Cache Hit ratios and their value in tuning Database I/O performance?

A.

The performance of workloads that primarily generate full table scans and fast full index scans are always affected by the cache hit ratio.

B.

A 99% cache hit ratio can be observed for database instances which have very poor I/O performance.

C.

The buffer cache advisory view v$db_cache_advice provides advice on cache hit ratios appropriate for the instance workload.

D.

Both the RECYCLE and KEEP buffer caches should always have a very high cache hit ratio.

E.

A 60% cache hit ratio can be observed for database instances which have very good I/O performance.

Full Access
Question # 13

A database supporting a mixed workload is hosted on a server with 64 CPUs.

A large number of free buffer waits and buffer busy waits occur affecting performance.

The buffer cache size was then increased but after a few hours, the same wait events occur more often than before the change.

Examine these parameter settings:

1z0-084 question answer

Which two actions can help reduce the number of these waits7

A.

increasing the value of DB_FILE_MULTIBLOCK_READ_COUNT to 128

B.

Increasing the size of MEMORYTARGET

C.

setting dbwr_io_slaves to 64

D.

increasing the value of DBWRITERPROCESSES to 64,

E.

reducing the values of DB_FILE_MULTILOCK_READ_COUNT to 64

Full Access
Question # 14

18. The application provider has given full indications regarding the procedure to collect statistics.

To reduce the space used in the SYSAUX tablespace, you want to prevent the optimizer statistics Advisor from running.

Which method will allow you to do this?

A.

Set the parameter OPTIMIZER_ADAPTIVE_STATISTICS to FALSE.

B.

Use DBMS_AUTO_TASK_ADMIN. DISABLE to disable the AUTO_STATS_ADVISOR_TASK task.

C.

Set the AUTO_STATS_ADVISOR_TASK global statistics preference to FALSE.

D.

Use DBMS STATS.DROP ADVISOR TASK to drop the AUTO_STATS_ADVISOR_TASK task.

Full Access
Question # 15

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:

1z0-084 question answer

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

A.

Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 50

B.

Setting DB_KEEP_CACHE_SIZE to at least 50M

C.

Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 25

D.

Increasing DB_CACHESIZE to 1 G

E.

Setting PARALLEL_DEGREE_POLICYADAPTIVE

F.

Setting PARALLEL_DEGREE_POLICYAUTO

Full Access
Question # 16

You manage a 19c database with default optimizer settings.

This statement is used extensively as subquery in the application queries:

SELECT city_id FROM sh2.sales WHERE city_id=:Bl

You notice the performance of these queries is often poor and, therefore, execute:

SELECT city_id,COUNT(*) FROM sh2.sales GROUP BY city_id;

Examine the results:

1z0-084 question answer

There is no index on the CITY_ID column.

Which two options improve the performance?

A.

Generate frequency histograms on the CITY__ID column.

B.

Create an index on the CITY IP column.

C.

Use a SQL Profile to enforce the appropriate plan.

D.

Force the subquery to use dynamic sampling.

E.

Activate the adaptive plans.

Full Access