DBS-C01 Monitoring and Troubleshooting Practice Question
Which TWO metrics should be monitored to troubleshoot an Amazon RDS for PostgreSQL database that is experiencing high connection count and connection timeouts?
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
✓
DatabaseConnections
Options A and C are correct. DatabaseConnections directly shows the number of concurrent connections to the RDS instance, helping monitor connection count. BurstBalance indicates whether the instance has exhausted its I/O burst credits; if it drops, I/O performance degrades and can cause connection timeouts. Option B (NetworkTransmitThroughput) measures network traffic, not connections. Option D (SwapUsage) tracks memory swapping, which is not a standard RDS metric and does not directly relate to connection timeouts. Option E (ReadLatency) measures I/O read latency, which can affect performance but is not a primary metric for high connection count or connection timeouts.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DatabaseConnections
Why this is correct
DatabaseConnections shows the number of client connections.
- ✗
NetworkTransmitThroughput
Why it's wrong here
NetworkTransmitThroughput is not directly related to connection count.
- ✓
BurstBalance
Why this is correct
BurstBalance helps identify if I/O is throttled, which can cause timeouts.
- ✗
SwapUsage
Why it's wrong here
SwapUsage is not a standard CloudWatch metric for RDS.
- ✗
ReadLatency
Why it's wrong here
ReadLatency measures I/O latency, not connection issues.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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