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Question 94 - DEA-C01 discussion

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Jonas, a Lead Performance Engineer,identifed that some of the operation of his query which functionally remove the duplicates from huge data set is spilling the data to remote disk. How can he alleviate spilling to a remote disk for better query performance?

A.
Jonas can recommend using a large warehouse which effectively increase the available memory/local disk space for the operations.
Answers
A.
Jonas can recommend using a large warehouse which effectively increase the available memory/local disk space for the operations.
B.
He can Process data in smaller batches to manage workload.
Answers
B.
He can Process data in smaller batches to manage workload.
C.
Spilling do not have a profound effect on query performance (especially if remote disk is used for spilling).
Answers
C.
Spilling do not have a profound effect on query performance (especially if remote disk is used for spilling).
D.
Data Sharing can be helpful to improve query performance.
Answers
D.
Data Sharing can be helpful to improve query performance.
Suggested answer: A, B

Explanation:

For some operations (e.g. duplicate elimination for a huge data set), the amount of memory available for the compute resources used to execute the operation might not be sufficient to hold intermediate results. As a result, the query processing engine will start spilling the data to local disk.

If the local disk space is not sufficient, the spilled data is then saved to remote disks.

This spilling can have a profound effect on query performance (especially if remote disk is used for spilling). To alleviate this, It is recommend that:

· Using a larger warehouse (effectively increasing the available memory/local disk space for the operation), and/or Processing data in smaller batches.

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asked 23/09/2024
asd asd
32 questions
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