What We Changed After an AWS Cost Incident
After a production issue exposed a gap in our cost monitoring, we added a simple billing threshold to catch unexpected AWS spending earlier.
Our previous article covered how a worker configuration caused unexpected Redis traffic and AWS costs.
After fixing the root cause, we added a billing alarm based on our actual usage pattern.
The rule is simple:
If the maximum bill amount over 6 hours > $X → trigger an alarm.
This doesn't detect anomalies. It gives us a clear spending threshold that we don't want to cross.
A small addition, but an important lesson:
Fix the bug. Then add guardrails to catch the next one earlier.
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