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Question 702 - COF-C02 discussion

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What does the Remote Disk I/O statistic in the Query Profile indicate?

A.

Time spent reading from the result cache.

Answers
A.

Time spent reading from the result cache.

B.

Time spent reading from the virtual warehouse cache.

Answers
B.

Time spent reading from the virtual warehouse cache.

C.

Time when the query processing was blocked by remote disk access.

Answers
C.

Time when the query processing was blocked by remote disk access.

D.

The level of network activity between the Cloud Services layer and the virtual warehouse.

Answers
D.

The level of network activity between the Cloud Services layer and the virtual warehouse.

Suggested answer: C

Explanation:

The Remote Disk I/O statistic in the Query Profile reflects time spent waiting on remote disk access, which can occur when data needs to be retrieved from external storage (remote). This metric is crucial for identifying bottlenecks related to I/O delays, often suggesting a need for performance optimization in data retrieval paths.

The other options relate to caching and network activity, but Remote Disk I/O specifically measures the wait time for data access from remote storage locations.

asked 12/11/2024
Jarrad Payne
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