SOA-C02 Monitoring, Logging, and Remediation Practice Question
A SysOps administrator notices that an Amazon RDS for MySQL instance's CPU utilization is consistently above 80% during business hours. The administrator wants to identify the queries causing the high load without impacting performance. Which action should be taken?
⚠ Common exam trap
It's easy for candidates to confuse Enhanced Monitoring (OS-level metrics) with Performance Insights (database-level query analysis), or assume the slow query log is the best tool for identifying all high-CPU queries despite its threshold-based limitation.
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
✓
Enable Performance Insights on the RDS instance.
Performance Insights provides a database-specific performance schema that visualizes database load and identifies the SQL queries responsible for high CPU utilization. It operates with minimal overhead by sampling the database engine's internal performance data, making it ideal for diagnosing query performance issues without impacting the production workload.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable the MySQL slow query log and store it in CloudWatch Logs.
Why it's wrong here
The MySQL slow query log only records statements whose execution time exceeds the configurable long_query_time threshold, so it can miss high-CPU workloads caused by a large number of quick, efficient queries. Furthermore, enabling this log adds I/O and logging overhead, and exporting it to CloudWatch Logs requires extra setup, yet it still does not directly correlate CPU utilization to individual statements already in flight.
- ✓
Enable Performance Insights on the RDS instance.
Why this is correct
Performance Insights provides a real-time database load dashboard that breaks down DB load by SQL, wait events, and dimensions such as hosts and users, allowing you to pinpoint the exact statements responsible for CPU spikes. It operates with minimal overhead by sampling internal diagnostic data continuously, making it the most direct tool for identifying the SQL causing high RDS CPU usage without requiring additional logging or manual query analysis.
- ✗
Enable Enhanced Monitoring to get OS-level metrics.
Why it's wrong here
Enhanced Monitoring collects OS-level metrics such as CPU utilization, memory usage, disk I/O, and network traffic from the instance’s hypervisor and delivers them to CloudWatch at granularities down to one second. While these metrics can confirm that CPU is saturated, they offer no visibility into database execution plans, SQL text, or which connections are running, so they cannot reveal the specific queries driving the high CPU load.
- ✗
Increase the retention period for CloudWatch metrics to 15 months.
Why it's wrong here
Increasing the retention period of CloudWatch metrics to 15 months simply keeps the same pre-aggregated data points available for longer, but it captures no additional metrics or query-level detail. Merely having historical metrics does not tell you which SQL statements or database operations caused CPU saturation, so this action only extends visibility backward in time and does nothing to diagnose the root cause of current load.
Go deeper
Related to this question
About these practice questions
This SOA-C02 question is part of Courseiva's 1,169-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SOA-C02 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 SOA-C02 exam.