多项选择题
You want to analyze a SQL Tuning Set (STS) using SQL Performance Analyzer in a test database. Which two statements are true regarding the activities performed during the test execution of SQLs in a SQL Tuning Set?（）
A.Every SQL statement in the STS is considered only once for execution
B.The SQL statements in the STS are executed concurrently to produce the execution plan and execution statistics
C.The execution plan and execution statistics are computed for each SQL statement in the STS
D.The effects of DDL and DML are considered to produce the execution plan and execution statistics
相关考题
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多项选择题
Which statements are true regarding the Query Result Cache? （）
A. It can be set at the system, session, or table level.
B. It is used only across statements in the same session.
C. It can store the results from normal as well as flashback queries.
D. It can store the results of queries based on normal, temporary, and dictionary tables. -
单项选择题
You specify a nonzero value for the MEMORY_TARGET initialization parameter, but do not set the PGA_AGGREGATE_TARGET or the SGA_TARGET parameters. You restart your database instance. Which statement about the result is true?（）
A. The database instance starts, and Oracle sets the default value of SGA_TARGET to the same value as SGA_MAX_SIZE
B. The database instance starts, and Oracle automatically tunes memory and allocates 60 percent to the SGA and 40 percent to the PGA
C. The database instance starts, but Automatic Memory Management is disabled
D. The database instance will not start because you did not specify the PGA_AGGREGATE_TARGET or SGA_TARGET parameter -
单项选择题
You are tuning RMAN to optimize performance.You want tape I/O to be asynchronous when you perform tape backups. Which action should you take?（）
A. Set the BACKUP_TAPE_IO_SLAVES parameter to FALSE
B.Set the BACKUP_TAPE_IO_SLAVES parameter to TRUE
C. Use compression when performing tape backups
D. Configure multiple SBT channels
