QUESTION NO: 15
What are the advantages of variable extent size support for large ASM files? (Choose two.)
A. It improves resync operations when the disk comes online after being taken offline for maintenance purposes.
B. It improves performance in the extended cluster configuration by reading from a local copy of an extent.
C. Fewer extent pointers are needed to describe the file and less memory is required to manage
the extent maps in the shared pool.
D. This feature enables faster file opens because of the reduction in the amount of memory that is
required to store file extents.
Answer: C,D
Explanation:

Variable size extents enable support for larger Oracle ASM data files, reduce SGA memory requirements for very large databases, and improve performance for file create and open operations. The initial extent size equals the disk group allocation unit size and it increases by a factor of 4 or 16 at predefined thresholds. This feature is automatic for newly created and resized data files when specific disk group compatibility attributes are set to 11.1 or higher.

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oracle.1z0-053:variable extent size support for large ASM files?

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