EC2 CloudWatch Metrics Blind Spots Diagnostic Troubleshooter
Use the interactive troubleshooter below to identify your EC2 CloudWatch metrics blind spot by symptom, review the raw evidence, understand the root cause, and apply the recommended fix.
🚨 Step 1: What specific monitoring blind spot are you experiencing?
Please click the most accurate description:
Quick Reference Table
| # | Scenario | Key Error Signal | Root Cause | The Fix |
|---|---|---|---|---|
| 1 | Auto Scaling delays and stale data visibility | Scaling on metrics with a 5-minute frequency | The scalable target relies on basic monitoring (5-minute frequency) instead of 1-minute detailed monitoring, causing visibility lag. | aws ec2 monitor-instances --instance-ids i-1234567890abcdef0 |
| 2 | EC2 Spot metric namespace black hole | if you've not used Spot Fleet for the past two weeks, the namespace does not appear | CloudWatch completely hides the EC2 Spot namespace if the service hasn't been actively utilized in the last two weeks. | N/A |
| 3 | CloudWatch alarm race condition | avoid setting the same number of evaluation periods | Both the reboot and recover CloudWatch alarms trigger concurrently because they share the exact same number of evaluation periods. | N/A |
| 4 | Invalid metric data retrieved via API | specify a period in your request that is equal to or greater than the collection period | The CloudWatch metric request specifies a Period parameter granularity that is smaller than the actual 1-minute collection period. | N/A |