Question 547 of 302
SAA-C03 Design Cost-Optimized Architectures Practice Question
A risk simulation workload uses CloudWatch Logs heavily. Retaining all debug logs forever is increasing costs. What should be configured?
⚠ Common exam trap
Many exam-takers confuse log retention with monitoring frequency or configuration management, mistakenly thinking that reducing metric collection (detailed monitoring) or using Config aggregation will lower log storage costs.
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
✓
CloudWatch Logs retention policies per log group
CloudWatch Logs retention policies allow you to set per-log-group expiration rules (e.g., 30 days, 90 days) to automatically delete old log events, directly reducing storage costs for debug logs that are no longer needed. This is the most cost-effective and targeted solution for managing log lifecycle without affecting other monitoring or configuration services.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
CloudWatch Logs retention policies per log group
Why this is correct
Retention policies automatically delete older logs after the required period.
- ✗
AWS Config aggregation
Why it's wrong here
Config aggregation does not control CloudWatch Logs retention.
- ✗
CloudWatch detailed monitoring on all instances
Why it's wrong here
Detailed monitoring increases metric granularity and may increase cost.
- ✗
Route 53 health checks
Why it's wrong here
Health checks monitor endpoints and do not manage log storage.
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Last reviewed: Jun 11, 2026
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