FinOps
3 posts
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AWS Cost Categories: what split charge rules can and can't do (2026)
Cost categories reorganise spend retroactively to the start of the month, which tags cannot. Split charge rules then divide shared cost across teams, but the result never leaves the console: it is absent from the CUR, Cost Explorer and Budgets.
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Why Cost Explorer and your CUR don't match (2026)
Same dataset, three different totals. The six differences AWS documents between billing data, Cost Explorer and the Cost and Usage Report, which number you actually owe, and what Cost Explorer charges per API request and per hourly usage record.
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How to stop one Athena query from scanning your whole CUR (2026)
Athena's two workgroup cost controls behave completely differently: the per-query limit cancels a query, the per-workgroup limit only alerts. Plus the charge for cancelled queries and the partial results they leave in S3.