Snowflake COF-C02 Exam - Topic 10 Question 49 Discussion

Actual exam question for Snowflake's COF-C02 exam

Question #: 49
Topic #: 10

[All COF-C02 Questions]

Which Query Profile metrics will provide information that can be used to improve query performance? (Select TWO).

ASynchronization

BRemote disk IO

CLocal disk IO

DPruning

ESpillage

Show Suggested Answer

Suggested Answer: B, D

Two key metrics in Snowflake's Query Profile that provide insights for performance improvement are:

Remote Disk IO: This measures the time the query spends waiting on remote disk access, indicating potential performance issues related to I/O bottlenecks.

Pruning: This metric reflects how effectively Snowflake's micro-partition pruning is reducing the data scanned. Better pruning (more partitions excluded) leads to faster query performance, as fewer micro-partitions need to be processed.

These metrics are essential for identifying and addressing inefficiencies in data retrieval and storage access, optimizing overall query performance.

by Francine at Jan 10, 2025, 08:41 PM

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Francene

3 months ago

Synchronization? Not sure how that helps with query speed.

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Lamonica

3 months ago

Wait, are we sure about Spillage? Seems less relevant.

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Jose

3 months ago

Pruning can really help with performance, no doubt!

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Stefan

4 months ago

I think Remote disk IO is important too.

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Rickie

4 months ago

Local disk IO is definitely a key metric!

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Elmer

4 months ago

I’m leaning towards Local disk IO and Pruning, but I wish I had reviewed more on Synchronization before the exam.

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Christoper

4 months ago

Pruning sounds familiar, and I feel like it could help with query performance, but I’m not confident about the other option.

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Fatima

4 months ago

I remember practicing with a question that mentioned Remote disk IO, and it seemed important for performance, but I can't recall if it's one of the answers here.

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Tijuana

5 months ago

I think Local disk IO might be one of the metrics since it relates to how data is accessed, but I'm not sure about the second one.

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Luis

5 months ago

Pruning and Remote disk IO - those are the two I'd go with. Pruning can show me where the query is being optimized, and Remote disk IO will tell me if there are any issues with the data source that could be slowing things down.

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Theron

5 months ago

I'm a little unsure about this one. I know Synchronization and Local disk IO are related to performance, but I'm not sure if they're the best options for this specific question. I'll have to review my notes to make sure.

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Carmelina

5 months ago

Okay, let's see. I'm pretty sure Pruning and Spillage are the two metrics that would be most helpful here. Those should give me some good insights into where the query is bottlenecking.

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Nana

5 months ago

Hmm, this one seems tricky. I'll need to think carefully about which metrics would provide the most useful information for improving query performance.

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Vivan

1 year ago

B and E, without a doubt. Remote disk IO and Spillage are the dynamic duo of query optimization. Just don't ask me to explain what they actually do - that's what the textbooks are for!

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Jolene

1 year ago

A and D, all the way! Synchronization and Pruning are the secret sauce to unlocking that sweet, sweet query performance. Although, I do hear Remote disk IO is the new craze among the kids these days.

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