Printable PDFOracle 1Z0-064 Exam Questions & Answers
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Vendor: Oracle
Exam Code: 1Z0-064
Exam Name: Oracle Database 12c: Performance Management and Tuning
Certification Provider: Oracle
Total Questions: 119 Q&A ( View Details)
Updated on: May 23, 2026
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1Z0-064 Online Practice Questions and Answers
You plan to upgrade your production database from Oracle Database 11g to 12c and also to introduce new objects to the database. You also want to upgrade the hardware. You have already created a test system with the upgrades to be made to the production database. As part of the testing, you want to:
analyze and compare the overall database workload with concurrency and transaction characteristics find SQL statements that might get regressed because of the upgrade analyze execution plans for SQL statements for which performance might get regressed analyze the impact of new schema objects on database performance
Which two tools would you recommend to achieve the objective? (Choose two.)
A. Database Replay
B. SQL Tuning Advisor
C. SQL Access Advisor
D. Automatic Database Diagnostic Monitor (ADDM) compare periods report
E. SQL Performance Analyzer
F. Automatic Workload Repository (AWR) compare periods report
A senior DBA asks you to decrease the values of the connect_time_scale and think_time_scale replay processing parameters to 50 to preprocess the workload for replay.
What three could be reasons for this change? (Choose three.)
A. to reduce the elapsed time between two successive user calls from a session.
B. to decrease the number of concurrent users during replay
C. to increase the number of concurrent users during replay
D. to reduce the time of replay
E. to decrease the wait for a query, caused by noncommitted transactions
You are administrating a database on a symmetric multiprocessing (SMP) machines. The database supports a mixed workload. You notice a large number of free buffer waits and buffer busy waits that are affecting the performance of the database. To mitigate the issue, you increase the buffer cache size, but after some time, you notice the same wait events with a high number.
Examine the parameters set for the instance:
Which two actions would you recommend to resolve the issue?
A. decreasing the idle time resource limit in the profile assigned to users
B. enabling asynchronous I/O for the file system C. increasing the value of the DB_FILE_MULTIBLOCK_READ_COUNT parameter
D. configuring the KEEP buffer pool
E. increasing the number of DBWn processes
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