← SOA-C02·Amazon Web Services

Question 446 of 1,546

Monitoring, Logging, and Remediation →mediumMultiple ChoiceObjective-mapped

Identify CPU-Intensive Queries on RDS with Performance Insights | AWS SysOps

This SOA-C02 practice question tests your understanding of monitoring, logging, and remediation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

A SysOps administrator notices that an Amazon RDS instance's CPU utilization is consistently above 90% during peak hours. The administrator needs to investigate which queries are consuming the most CPU. Which action should the administrator take?

A
Enable Performance Insights for the RDS instance and review the top SQL queries.
Performance Insights shows the top queries by CPU usage, enabling targeted optimization.
B
Use CloudWatch Logs Insights to query the database error log for slow queries.
Why wrong: Slow query logs can help, but Performance Insights is more direct for CPU analysis.
C
Enable detailed CloudWatch metrics for the RDS instance and analyze the CPUUtilization metric.
Why wrong: CloudWatch metrics do not show which queries are using CPU.
D
Enable RDS Enhanced Monitoring and review the 'cpuCreditUsage' metric.
Why wrong: Enhanced Monitoring provides OS metrics, not query-level details.

Full breakdown with real-world context →

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 for the RDS instance and review the top SQL queries.

Performance Insights is the correct tool because it provides a database-specific performance schema that visualizes database load and identifies the top SQL queries consuming resources. By enabling Performance Insights on the RDS instance, the administrator can directly view which queries are responsible for the high CPU utilization during peak hours, allowing targeted optimization.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

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 Performance Insights for the RDS instance and review the top SQL queries.
Why this is correct
Performance Insights shows the top queries by CPU usage, enabling targeted optimization.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use CloudWatch Logs Insights to query the database error log for slow queries.
Why it's wrong here
Slow query logs can help, but Performance Insights is more direct for CPU analysis.
✗
Enable detailed CloudWatch metrics for the RDS instance and analyze the CPUUtilization metric.
Why it's wrong here
CloudWatch metrics do not show which queries are using CPU.
✗
Enable RDS Enhanced Monitoring and review the 'cpuCreditUsage' metric.
Why it's wrong here
Enhanced Monitoring provides OS metrics, not query-level details.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is confusing aggregate metrics (CloudWatch CPUUtilization) or OS-level metrics (Enhanced Monitoring) with database-specific query performance analysis, leading candidates to choose options that show overall CPU usage but not the root-cause queries.

Trap categories for this question

Command / output trap
CloudWatch metrics do not show which queries are using CPU.

Detailed technical explanation

How to think about this question

Performance Insights uses the database engine's built-in performance schema (e.g., MySQL's performance_schema or PostgreSQL's pg_stat_statements) to collect wait events and SQL digest data, which is then aggregated into a 'DB Load' chart measured in average active sessions (AAS). This allows the administrator to drill down into specific queries, hosts, or users causing the highest load, even distinguishing between CPU wait and other wait types like I/O or locks.

KKey Concepts to Remember

Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.

TExam Day Tips

Watch for words such as best, first, most likely and least administrative effort.
Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this SOA-C02 question test?

Monitoring, Logging, and Remediation — This question tests Monitoring, Logging, and Remediation — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Enable Performance Insights for the RDS instance and review the top SQL queries. — Performance Insights is the correct tool because it provides a database-specific performance schema that visualizes database load and identifies the top SQL queries consuming resources. By enabling Performance Insights on the RDS instance, the administrator can directly view which queries are responsible for the high CPU utilization during peak hours, allowing targeted optimization.

What should I do if I get this SOA-C02 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

About these practice questions

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Same concept, more angles

1 more ways this is tested on SOA-C02

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. A SysOps administrator is troubleshooting an Amazon RDS for MySQL instance that is experiencing high CPU utilization. The administrator wants to identify the specific queries consuming the most CPU. What is the MOST efficient way to achieve this?

easy

A.Use CloudWatch metrics for RDS and create a dashboard for CPU utilization.
✓ B.Enable Performance Insights for the RDS instance and view the top SQL queries.
C.Enable Enhanced Monitoring for the RDS instance and view the CPU metrics.
D.Enable CloudWatch Logs for the RDS instance and filter for slow query logs.

Why B: Performance Insights provides a built-in database load visualization and a dashboard that directly shows the top SQL queries consuming the most resources, including CPU. This is the most efficient method because it requires no additional configuration beyond enabling the feature and immediately surfaces the specific queries causing high CPU utilization.

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