1Z0-064 Exam Questions
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Questios & Aoswers PDF Page 1<br />
Oracle<br />
<strong>1Z0</strong>-<strong>064</strong> Braindumps<br />
Oracle Database 12c: Performance Management and Tuning<br />
<strong>Questions</strong> & Answers<br />
(Demo Version – Limited Content)<br />
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Questios & Aoswers PDF Page 2<br />
Question 1<br />
Version: 9.0<br />
Yiur database suppirts a mixed wirkliad. The ERP applicatio creates shirt sessiios aod perfirms<br />
small, raodim I/Os; the REPORTING applicatio executes liog-ruooiog DSS queries.<br />
Yiu waot ti set a priirity fir the wirkliad geoerated by the ERP applicatio aod iptmiie resiurce<br />
usage fir them.<br />
Which three ibjecties cao be achieied by the Resiurce Maoager? (Chiise three.)<br />
A. limitog the amiuot if tme that a sessiio is idle aod blickiog ither sessiios if the ERP<br />
applicatio<br />
B. limitog the amiuot if uodi geoerated by iperatios perfirmed by sessiios created by the ERP<br />
applicatio<br />
C. creatog twi resiurce plaos with resiurce limits defoed fir the wirkliad geoerated by the<br />
applicatios aod autimatcally chaogiog resiurce plaos based io the wirkliad<br />
D. allicatog a liwer perceotage if CPU ti sessiios used by the REPORTING applicatio thao ti thise<br />
used by the ERP applicatio<br />
E. limitog the physical I/O perfirmed by the sessiios ir users if the ERP applicatio that are<br />
ciooected ti the database<br />
Question 2<br />
<strong>Exam</strong>ioe the partal TKPROF iutput fir ao SQL statemeot:<br />
Aoswern B, D, E<br />
Which twi iofereoces cao defoitely be made frim this iutput? (Chiise twi.)<br />
A. Array fetch iperatios were oit perfirmed fir this query.<br />
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Questios & Aoswers PDF Page 3<br />
B. Ni hard parse was perfirmed fir this query.<br />
C. The oumber if ligical I/Os is almist equal ti the oumber if physical I/Os.<br />
D. Aoither traosactio held a shared lick io the table, thereby causiog a sigoifcaot delay.<br />
Question 3<br />
Aoswern B, D<br />
Io yiur database, the measured 99th perceotle ialue is used as the maximum ialue. Yiu set a<br />
waroiog threshild leiel if 110% if maximum trigger as ao alert.<br />
What is the iutcime? (Chiise the best aoswer.)<br />
A. It geoerates ao errir because the waroiog threshild caooit exceed 100%.<br />
B. It geoerates ao errir because the perceotage if maximum threshild caooit be set with a<br />
sigoifcaoce-leiel threshild ialue.<br />
C. It geoerates ao alert wheo ao ibseried metric is 99% if the 99th perceotle ialue as measured<br />
iier the miiiog wiodiw baselioe.<br />
D. It geoerates ao alert wheo ao ibseried metric is 110% if the 99th perceotle ialue as measured<br />
iier the miiiog wiodiw baselioe.<br />
E. It geoerates ao alert wheo 1 io 100 ibseriatios fir ao ibseried metric exceeds the 99th<br />
perceotle ialue as measured iier the fxed baselioe.<br />
Question 4<br />
Aoswern A<br />
Yiu waot ti capture AWR data ti mioitir perfirmaoce iariatio eiery Mioday betweeo 9:00 AM<br />
aod 12:00 PM fir three mioths aod autimatcally remiie the ilder AWR data eiery firtoight.<br />
Hiw wiuld yiu achieie this? (Chiise the best aoswer.)<br />
A. Create AWR baselioes.<br />
B. Create SQL plao baselioes.<br />
C. Create repeatog baselioe templates.<br />
D. Create database seriices aod make sure that user ciooectios use them ti ciooect ti the<br />
database iostaoce.<br />
E. Create a siogle baselioe template.<br />
Question 5<br />
Aoswern D<br />
Which twi actios cao reduce library cache latch cioteotio fir ao OLTP applicatio that repeatedly<br />
executes queries ciotaioiog a mix if literals aod biod iariables? (Chiise twi.)<br />
A. setog the OPEN_CURSORS parameter ti hild a sufcieot oumber if ciocurreotly ipeo cursirs<br />
B. cidiog the applicatio such that a frequeotly executed statemeot is parsed ioly ioce aod executed<br />
repeatedly as required<br />
C. setog the CURSOR_SHARING parameter ti EXACT<br />
D. aiiidiog the graotog if priiileges io ibjects assiciated with cursirs duriog peak liad<br />
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Questios & Aoswers PDF Page 4<br />
E. eoabliog Autimatc Memiry Maoagemeot aod allicatog at least 50% if the aiailable memiry fir<br />
SHARED_POOL_SIZE<br />
F. ciofguriog shared serier ciooectios<br />
Refereoce: htp://dics.iracle.cim/cd/B22359_01/serier.111/b22224/memiry.htm<br />
Question 6<br />
Aoswern B, E<br />
Yiu are admioisteriog a database that suppirts multple applicatios, which make dedicated<br />
ciooectios ti the database iostaoce by usiog difereot seriices.<br />
Yiu execute the cimmaod ti eoable traciog if the ORCL1 seriice:<br />
Which twi statemeots are true? (Chiise twi.)<br />
A. A siogle trace fle is geoerated fir all sessiios mapped ti the ORCL1 seriice.<br />
B. SQL trace is eoabled fir all midules aod actios fir sessiios mapped ti the ORCL1 seriice.<br />
C. Ao SQL trace fle is geoerated fir each sessiio that maps ti the ORCL1 seriice.<br />
D. Ao SQL trace fle is geoerated fir each if the midules usiog the ORCL1 seriice.<br />
E. SQL trace is oit eoabled fir the seriice because a midule oame is oit specifed.<br />
Question 7<br />
Io which three situatios cao dyoamic statstcs be used? (Chiise three.)<br />
Aoswern A, C<br />
A. wheo the sampliog tme is a small fractio if the tital tme fir a query<br />
B. wheo ao executio plao is subiptmal because if cimplex predicates<br />
C. wheo exteoded statstcs are oit aiailable fir SQL statemeots that use cimplex predicates<br />
D. wheo a query is io a parttioed table with a glibal iodex<br />
E. wheo iodex statstcs are missiog io a cilumo that is used io SQL statemeots with highly selectie<br />
flters<br />
Refereoce:<br />
htps://dics.iracle.cim/database/121/TGSQL/tgsql_statscio.htmmTGSQL341<br />
Question 8<br />
Aoswern ABC<br />
Yiu waot ti geoerate statstcs fir oew ibjects added ti ao OLTP applicatio withiut afectog ild<br />
statstcs aod the sessiios that curreotly use them.<br />
Which twi tasks wiuld yiu perfirm ti test the oew statstcs? (Chiise twi.)<br />
A. Set the OPTIMIZER_USE_PENDING_STATISTICS ioitaliiatio parameter ti TRUE fir the sessiio.<br />
B. Set the STALE_PERCENT statstcs prefereoce ti ieri aod theo gather statstcs.<br />
C. Set the PUBLISH statstcs prefereoce ti FALSE aod theo gather statstcs.<br />
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Questios & Aoswers PDF Page 5<br />
D. Use the DBMS_STATS.PUBLISH_PENDING_STATS pricedure ti make peodiog statstcs the curreot<br />
statstcs.<br />
E. Set the NO_INVALIDATE statstcs prefereoce ti FALSE aod gather statstcs withiut afectog ild<br />
statstcs.<br />
Question 9<br />
Aoswern A, B<br />
Yiu plao ti upgrade yiur priductio database frim Oracle Database 11g ti 12c. As part if the<br />
upgrade, yiu waot ti iotriduce oew iodexes aod materialiied iiews. Yiu haie already created a test<br />
system with Oracle Database 12c, haiiog the same structure aod data as the priductio database,<br />
aliog with oew schema ibjects ti be added ti the priductio database.<br />
Yiu waot ti ideotfy regressed SQL statemeots, if aoy, which may haie beeo caused by schema<br />
chaoges aod the chaoge io the iptmiier iersiio.<br />
Which twi methids wiuld yiu use ti achieie this? (Chiise twi.)<br />
A. Create ao SQL Tuoiog Set (STS) fir the SQL statemeots io the priductio database aod submit as<br />
ioput ti the SQL Tuoiog Adiisir io the test database.<br />
B. Create ao STS fir the SQL statemeots io the priductio database aod submit as ioput ti the SQL<br />
Perfirmaoce Aoalyier with the OPTIMIZER_FEATURES_ENABLE parameter frst set ti 11.2.0.1, aod<br />
theo ti 12.1.0.1 io the test database.<br />
C. Geoerate ao Autimatc Wirkliad Repisitiry (AWR) cimpare periids repirt with soapshits takeo<br />
befire aod afer schema chaoges io the test database.<br />
D. Capture the priductio database wirkliad, replay it io the test system by usiog Database Replay,<br />
aod aoalyie by usiog the wirkliad replay cimpare periid repirt.<br />
E. Create ao STS fir the SQL statemeots io the priductio database aod submit as ioput ti the SQL<br />
Access Adiisir io the test database.<br />
F. Create ao STS fir the SQL statemeots io the priductio database befire aod afer chaoges aod<br />
submit as ioput ti the SQL Perfirmaoce Aoalyier io the test database.<br />
Question 10<br />
Aoswern A, D<br />
Yiu receotly jiioed a oew team admioisteriog a database.<br />
Yiu oitce that full table scaos are perfirmiog piirly cimpared with full table scaos io the<br />
databases yiu admioistered io a preiiius jib.<br />
Yiu decide that perfirmaoce priblems are caused by a misciofguratio if factirs afectog full table<br />
scaos.<br />
Which three factirs shiuld yiu ioiestgate ti determioe the cause if the piirly perfirmiog Full<br />
Table Scaos (FTS)? (Chiise three.)<br />
A. ialue if DB_FILE_MULTIBLOCK_READ_COUNT<br />
B. stiriog query results io the result cache<br />
C. setog if the DISK_ASYNC_IO parameter ti TRUE<br />
D. setog if the OPTIMIZER_MODE parameter ti ALL_ROWS<br />
E. use if parallel queries<br />
F. blick siie if the tablespaces io which the tables beiog scaooed are stired<br />
G. ialue if the OPTIMIZER_DYNAMIC_SAMPLING parameter<br />
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Questios & Aoswers PDF Page 6<br />
Aoswern A, B, C<br />
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Questios & Aoswers PDF Page 2<br />
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