1Z0-064Oracle Database 12c: Performance Management and Tuning
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1Z0-064 Online Practice Questions and Answers
You observe that queries are performing poorly on the SALES_RECORDS table in your database. On investigation, you find that at the end of each day the contents of the SALES_RECORDS table are moved to the SALES_HISTORY table. The delete operations cause the table to be sparsely populated.
The SALES_RECORDS table is created in a tablespace using Automatic Segment Space Management (ASSM) and row movement is enabled. The table must be accessible 24x7.
Which two tasks would you recommend to improve the performance? (Choose two.)
A. Perform EXPORT, DROP, and IMPORT operations on the SALES_RECORDS table.
B. Shrink the SALES_RECORDS table by using the ALTER TABLE...SHRINK SPACE command.
C. Move the SALES_RECORDS table to a different location by using the ALTER TABLE...MOVE command.
D. Deallocate the space in the SALES_RECORDS table by using the ALTER TABLE...DEALLOCATE UNUSED command.
E. Move the SALES_RECORDS table to a tablespace by using manual segment space management.
F. Reorganize the SALES_RECORDS table online by using the DBMS_REDEFINITION package.
A parallel SQL statement is taking a long time to execute. You want to verify how the server processes are dividing work.
How should you determine this?
A. by using Real-Time ADDM
B. by using services
C. by using SQL Tuning Advisor
D. by using ASH
E. by using Real-Time SQL monitoring
Which four statements are true about Consolidated Database Replay?
A. Multiple replay schedules can be defined and any existing replay schedules can also be used.
B. Multiple database workloads can be replayed only if both the capture and replay databases are on the same operating system.
C. The replay starts simultaneously for all participating workload captures if no order is defined in the replay schedule.
D. Consolidated workloads from one or multiple databases can be replayed concurrently on a single system.
E. A subset of the captured workload can be replayed on a test system.
F. Multiple database workloads can be replayed only if both the capture and replay databases have the same database version.
G. The number of replay clients must be equal to the number of captured workloads.
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