DBS-C01 Monitoring and Troubleshooting Practice Question
A company is using Amazon DynamoDB with provisioned capacity. The application is experiencing throttling on write requests. The database specialist needs to identify the cause. Which TWO metrics should be reviewed in CloudWatch? (Select TWO.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
ConsumedWriteCapacityUnits
'ConsumedWriteCapacityUnits' shows the actual write capacity used, helping to determine if provisioned capacity is exceeded, which leads to throttling. Option B is correct because 'WriteThrottleEvents' directly indicates the number of throttled write requests. Option C is incorrect because 'ThrottledWriteRequests' is not a valid CloudWatch metric for DynamoDB; the correct metric for throttled writes is 'WriteThrottleEvents'. Option D is incorrect because 'ReadThrottleEvents' pertains to read throttling, not writes. Option E is incorrect because 'SuccessfulRequestLatency' measures latency, not throttling events.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
ConsumedWriteCapacityUnits
Why this is correct
ConsumedWriteCapacityUnits shows the write capacity used; if it approaches provisioned capacity, throttling may occur.
- ✓
WriteThrottleEvents
Why this is correct
WriteThrottleEvents directly reports write throttling events, which is the metric to review when experiencing throttling.
- ✗
ThrottledWriteRequests
Why it's wrong here
ThrottledWriteRequests is not a valid CloudWatch metric for DynamoDB. The correct metric is WriteThrottleEvents.
- ✗
ReadThrottleEvents
Why it's wrong here
ReadThrottleEvents is for read requests, not writes.
- ✗
SuccessfulRequestLatency
Why it's wrong here
SuccessfulRequestLatency measures the latency of successful requests, not throttling.
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