DBS-C01 Monitoring and Troubleshooting Practice Question
A company is migrating their on-premises Oracle database to Amazon RDS for Oracle. They need to ensure minimal downtime. During the migration, they observe that the change data capture (CDC) is falling behind. What is the most effective approach to catch up?
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
✓
Increase the instance size of the target RDS instance
Increasing the instance size of the target RDS instance provides more CPU and memory resources for the CDC process, allowing it to process more changes per unit time and catch up on lag. Option A is incorrect because disabling supplemental logging on the source Oracle database would prevent the capture of necessary change data, breaking CDC entirely and preventing any catch-up. Option C is incorrect because pausing the CDC task would stop processing changes, allowing the lag to grow further, not catch up. Option D is incorrect because stopping CDC and performing a full load migration would cause significant downtime, which contradicts the requirement for minimal downtime.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Disable supplemental logging on the source
Why it's wrong here
Logging is required for CDC.
- ✓
Increase the instance size of the target RDS instance
Why this is correct
More CPU/memory can help the apply process catch up.
- ✗
Pause the CDC task and resume later
Why it's wrong here
Pausing increases lag.
- ✗
Stop the CDC and perform a full load migration
Why it's wrong here
Full load causes downtime.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.