AWS - Auto Scaling
You configured auto scaling to add instances when CPU exceeds 80%, but no new instances launch despite CPU at 90%. What could cause this?
You configured auto scaling to add instances when CPU exceeds 80%, but no new instances launch despite CPU at 90%. What could cause this?
medium📝 Debug Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze scaling conditions
Scaling triggers when CPU > 80%, but no new instances appear despite 90% CPU.Step 2: Consider limits
If the maximum number of instances is already running, no scale out occurs.Step 3: Evaluate other options
Minimum count or threshold settings wouldn't prevent scaling out at high CPU; stopped instances don't affect scaling triggers.Final Answer:
The maximum instance limit has been reached -> Option BQuick Check:
Max limit blocks scaling out [OK]
Quick Trick: Max instance limit stops scaling out [OK]
Common Mistakes:
- Confusing minimum and maximum instance settings
- Assuming threshold misconfiguration
- Ignoring instance state effects
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