Discuss Alibaba ACP-Cloud1 Exam Topic 8 Question 80

Which of the following is not a potential cause of latency on an RDS read-only instance?

AThe load on this read-only instance is significant.

BThere exists significant load on the ECS that is connected to this read-only instance.

CThe specification of this read-only instance is too low.

DThis read-only instance's master instance is performing a lot of write operations.

Suggested Answer: B

Latency on an RDS read-only instance can be caused by high loads on the instance itself, inadequate instance specifications, or excessive write operations on the master instance, as these factors directly impact replication delay and resource contention. However, a high load on the ECS instance connected to the RDS read-only instance would not inherently cause latency on the RDS instance, as the ECS and RDS operate independently in terms of processing.

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36 comments · newest first

Martina 9 months ago

I disagree with D; it shouldn't impact read-only performance.

Lynette 10 months ago

A low spec instance can totally cause issues, so C makes sense.

Claudio 10 months ago

Wait, how can the master instance affect a read-only one?

Renea 10 months ago

I think D is the right answer here.

Catalina 10 months ago

I’m leaning towards C because if the instance specs are low, it could cause latency, but I’m not completely confident.

Johanna 10 months ago

I practiced a similar question last week, and I feel like the load on the read-only instance itself is definitely a factor, so maybe it's A?

Lawrence 10 months ago

Option B is definitely a cause of latency.

Anika 11 months ago

I think option B might be the right answer since the ECS load shouldn't directly affect the read-only instance.

Whitley 11 months ago

I'm not entirely sure, but I remember something about how the master instance's writes can impact latency. Could it be D?

Wei 11 months ago

I've got this! The read-only instance's master instance performing a lot of write operations is not a potential cause of latency on the read-only instance. That's the one that doesn't fit.

Teddy 11 months ago

Okay, let's see. The load on the read-only instance itself is a potential cause, as is the load on the connected ECS. The instance specification could also be a factor. I'll need to carefully consider each option.

Pok 12 months ago

Hmm, I'm not entirely sure about this. I'll need to review my notes on RDS read-only instances and their potential performance issues.

Heike 12 months ago

This is a tricky one. I'll need to think through the potential causes of latency on an RDS read-only instance.

Antione 12 months ago

Ah, I see now. The specification of the read-only instance being too low is the only one that's not a potential cause of latency. Gotta pay attention to those negatives!

Dierdre 1 year ago

I think I've got it. The load on the ECS connected to the read-only instance is a potential cause, but the master instance's write operations shouldn't be, since this is a read-only instance.

Santos 1 year ago

I'm a bit confused by the wording of the question. Is the "not a potential cause" part the key here?

Graciela 1 year ago

Okay, let's see. The load on the read-only instance itself is a potential cause, but what about the other options?

Gerri 1 year ago

Hmm, this one seems tricky. I'll need to think through the potential causes of latency on an RDS read-only instance.

Wenona 2 years ago

I think the answer is C because if the specification is too low, it could cause latency issues regardless of other factors.

Ettie 2 years ago

I'm stumped on this one. Maybe I should have read the RDS documentation more closely...

Domonique 1 year ago

↳ replying to Ettie

B) There exists significant load on the ECS that is connected to this read-only instance.

Terrilyn 1 year ago

↳ replying to Ettie

A) The load on this read-only instance is significant.

Luis 2 years ago

Ha! This question is a real 'page-turner'! I'm going to guess A. Significant load on the read-only instance itself seems like the most obvious cause of latency.

Mike 1 year ago

↳ replying to Luis

C could also be a factor. If the specification of the read-only instance is too low, it might struggle to keep up.

Lashon 1 year ago

↳ replying to Luis

I agree with you, A seems like the most likely cause of latency on the read-only instance.

Idella 1 year ago

↳ replying to Luis

I'm going with D. If the master instance is doing a lot of writes, that could slow things down.

Wilda 1 year ago

↳ replying to Luis

I think it's B. The load on the ECS could definitely be causing latency.

Rhea 2 years ago

But if the master instance is doing a lot of writes, wouldn't that affect the read-only instance's latency?

Alexis 2 years ago

I disagree, I believe the answer is D.

Corrina 2 years ago

This is a tricky one, but I'm going to say C. If the instance specs are too low, that could definitely lead to latency.

Glory 2 years ago

I'm going to go with D. If the master instance is doing a lot of write ops, that could definitely impact the read-only instance.

Rhea 2 years ago

I think the answer is B.

Youlanda 2 years ago

Hmm, I think the answer is B. The load on the ECS connected to the read-only instance could definitely cause latency.

Leeann 2 years ago

↳ replying to Youlanda

I'm not sure, but I think it could also be D. The master instance performing a lot of write operations might also cause latency.

Daron 2 years ago

↳ replying to Youlanda

I agree, the load on the ECS could definitely be a potential cause of latency.

Eden 2 years ago

↳ replying to Youlanda

I think the answer is B. The load on the ECS connected to the read-only instance could definitely cause latency.

Alibaba ACP-Cloud1 Exam - Topic 8 Question 80 Discussion