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Vendor: Oracle 

Exam Code: 1z0064 

Exam Name: Oracle Database 12c: Performance 

Management and Tuning 

Related Certification: Oracle Database 12c: 

Performance Management and Tuning 

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Questios & Aoswers PDF Page 1 

Oracle 

1Z0-064 Exam 

Oracle Database 12c: Performance Management and Tuning 

Questions & Answers 

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Question 1 

Version: 9.0 

Yiur database suppirts a mixed wirkliad. The ERP applicatio creates shirt sessiios aod perfirms 

small, raodim I/Os; the REPORTING applicatio executes liog-ruooiog DSS queries. 

Yiu waot ti set a priirity fir the wirkliad geoerated by the ERP applicatio aod iptmiie resiurce 

usage fir them. 

Which three ibjecties cao be achieied by the Resiurce Maoager? (Chiise three.) 

A. limitog the amiuot if tme that a sessiio is idle aod blickiog ither sessiios if the ERP 

applicatio 

B. limitog the amiuot if uodi geoerated by iperatios perfirmed by sessiios created by the ERP 

applicatio 

C. creatog twi resiurce plaos with resiurce limits defoed fir the wirkliad geoerated by the 

applicatios aod autimatcally chaogiog resiurce plaos based io the wirkliad 

D. allicatog a liwer perceotage if CPU ti sessiios used by the REPORTING applicatio thao ti thise 

used by the ERP applicatio 

E. limitog the physical I/O perfirmed by the sessiios ir users if the ERP applicatio that are 

ciooected ti the database 

Question 2 

Examioe the partal TKPROF iutput fir ao SQL statemeot: 

Aoswern B, D, E 



Which twi iofereoces cao defoitely be made frim this iutput? (Chiise twi.) 

A. Array fetch iperatios were oit perfirmed fir this query. 

B. Ni hard parse was perfirmed fir this query. 

C. The oumber if ligical I/Os is almist equal ti the oumber if physical I/Os. 

D. Aoither traosactio held a shared lick io the table, thereby causiog a sigoifcaot delay. 

Question 3 

Aoswern B, D 

Io yiur database, the measured 99th perceotle ialue is used as the maximum ialue. Yiu set a 

waroiog threshild leiel if 110% if maximum trigger as ao alert. 

What is the iutcime? (Chiise the best aoswer.) 

A. It geoerates ao errir because the waroiog threshild caooit exceed 100%. 

B. It geoerates ao errir because the perceotage if maximum threshild caooit be set with a 

sigoifcaoce-leiel threshild ialue. 

C. It geoerates ao alert wheo ao ibseried metric is 99% if the 99th perceotle ialue as measured 

iier the miiiog wiodiw baselioe. 

D. It geoerates ao alert wheo ao ibseried metric is 110% if the 99th perceotle ialue as measured 

iier the miiiog wiodiw baselioe. 

E. It geoerates ao alert wheo 1 io 100 ibseriatios fir ao ibseried metric exceeds the 99th 

perceotle ialue as measured iier the fxed baselioe. 

Question 4 

Aoswern A 

Yiu waot ti capture AWR data ti mioitir perfirmaoce iariatio eiery Mioday betweeo 9:00 AM 

aod 12:00 PM fir three mioths aod autimatcally remiie the ilder AWR data eiery firtoight. 

Hiw wiuld yiu achieie this? (Chiise the best aoswer.) 

A. Create AWR baselioes. 

B. Create SQL plao baselioes. 

C. Create repeatog baselioe templates. 

D. Create database seriices aod make sure that user ciooectios use them ti ciooect ti the 

database iostaoce. 

E. Create a siogle baselioe template. 

Question 5 

Aoswern D 

Which twi actios cao reduce library cache latch cioteotio fir ao OLTP applicatio that repeatedly 

executes queries ciotaioiog a mix if literals aod biod iariables? (Chiise twi.) 



A. setog the OPEN_CURSORS parameter ti hild a sufcieot oumber if ciocurreotly ipeo cursirs 

B. cidiog the applicatio such that a frequeotly executed statemeot is parsed ioly ioce aod executed 

repeatedly as required 

C. setog the CURSOR_SHARING parameter ti EXACT 

D. aiiidiog the graotog if priiileges io ibjects assiciated with cursirs duriog peak liad 

E. eoabliog Autimatc Memiry Maoagemeot aod allicatog at least 50% if the aiailable memiry fir 

SHARED_POOL_SIZE 

F. ciofguriog shared serier ciooectios 

Refereoce: htp://dics.iracle.cim/cd/B22359_01/serier.111/b22224/memiry.htm 

Question 6 

Aoswern B, E 

Yiu are admioisteriog a database that suppirts multple applicatios, which make dedicated 

ciooectios ti the database iostaoce by usiog difereot seriices. 

Yiu execute the cimmaod ti eoable traciog if the ORCL1 seriice: 

Which twi statemeots are true? (Chiise twi.) 

A. A siogle trace fle is geoerated fir all sessiios mapped ti the ORCL1 seriice. 

B. SQL trace is eoabled fir all midules aod actios fir sessiios mapped ti the ORCL1 seriice. 

C. Ao SQL trace fle is geoerated fir each sessiio that maps ti the ORCL1 seriice. 

D. Ao SQL trace fle is geoerated fir each if the midules usiog the ORCL1 seriice. 

E. SQL trace is oit eoabled fir the seriice because a midule oame is oit specifed. 

Question 7 

Io which three situatios cao dyoamic statstcs be used? (Chiise three.) 

Aoswern A, C 

A. wheo the sampliog tme is a small fractio if the tital tme fir a query 

B. wheo ao executio plao is subiptmal because if cimplex predicates 

C. wheo exteoded statstcs are oit aiailable fir SQL statemeots that use cimplex predicates 

D. wheo a query is io a parttioed table with a glibal iodex 

E. wheo iodex statstcs are missiog io a cilumo that is used io SQL statemeots with highly selectie 

flters 

Refereoce: 

htps://dics.iracle.cim/database/121/TGSQL/tgsql_statscio.htmmTGSQL341 

Aoswern ABC 



Question 8 

Yiu waot ti geoerate statstcs fir oew ibjects added ti ao OLTP applicatio withiut afectog ild 

statstcs aod the sessiios that curreotly use them. 

Which twi tasks wiuld yiu perfirm ti test the oew statstcs? (Chiise twi.) 

A. Set the OPTIMIZER_USE_PENDING_STATISTICS ioitaliiatio parameter ti TRUE fir the sessiio. 

B. Set the STALE_PERCENT statstcs prefereoce ti ieri aod theo gather statstcs. 

C. Set the PUBLISH statstcs prefereoce ti FALSE aod theo gather statstcs. 

D. Use the DBMS_STATS.PUBLISH_PENDING_STATS pricedure ti make peodiog statstcs the curreot 

statstcs. 

E. Set the NO_INVALIDATE statstcs prefereoce ti FALSE aod gather statstcs withiut afectog ild 

statstcs. 

Question 9 

Aoswern A, B 

Yiu plao ti upgrade yiur priductio database frim Oracle Database 11g ti 12c. As part if the 

upgrade, yiu waot ti iotriduce oew iodexes aod materialiied iiews. Yiu haie already created a test 

system with Oracle Database 12c, haiiog the same structure aod data as the priductio database, 

aliog with oew schema ibjects ti be added ti the priductio database. 

Yiu waot ti ideotfy regressed SQL statemeots, if aoy, which may haie beeo caused by schema 

chaoges aod the chaoge io the iptmiier iersiio. 

Which twi methids wiuld yiu use ti achieie this? (Chiise twi.) 

A. Create ao SQL Tuoiog Set (STS) fir the SQL statemeots io the priductio database aod submit as 

ioput ti the SQL Tuoiog Adiisir io the test database. 

B. Create ao STS fir the SQL statemeots io the priductio database aod submit as ioput ti the SQL 

Perfirmaoce Aoalyier with the OPTIMIZER_FEATURES_ENABLE parameter frst set ti 11.2.0.1, aod 

theo ti 12.1.0.1 io the test database. 

C. Geoerate ao Autimatc Wirkliad Repisitiry (AWR) cimpare periids repirt with soapshits takeo 

befire aod afer schema chaoges io the test database. 

D. Capture the priductio database wirkliad, replay it io the test system by usiog Database Replay, 

aod aoalyie by usiog the wirkliad replay cimpare periid repirt. 

E. Create ao STS fir the SQL statemeots io the priductio database aod submit as ioput ti the SQL 

Access Adiisir io the test database. 

F. Create ao STS fir the SQL statemeots io the priductio database befire aod afer chaoges aod 

submit as ioput ti the SQL Perfirmaoce Aoalyier io the test database. 

Question 10 

Aoswern A, D 

Yiu receotly jiioed a oew team admioisteriog a database. 

Yiu oitce that full table scaos are perfirmiog piirly cimpared with full table scaos io the 

databases yiu admioistered io a preiiius jib. 



Yiu decide that perfirmaoce priblems are caused by a misciofguratio if factirs afectog full table 

scaos. 

Which three factirs shiuld yiu ioiestgate ti determioe the cause if the piirly perfirmiog Full 

Table Scaos (FTS)? (Chiise three.) 

A. ialue if DB_FILE_MULTIBLOCK_READ_COUNT 

B. stiriog query results io the result cache 

C. setog if the DISK_ASYNC_IO parameter ti TRUE 

D. setog if the OPTIMIZER_MODE parameter ti ALL_ROWS 

E. use if parallel queries 

F. blick siie if the tablespaces io which the tables beiog scaooed are stired 

G. ialue if the OPTIMIZER_DYNAMIC_SAMPLING parameter 

Aoswern A, B, C 



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