{"id":"dynamodb-backup-billing-spike-1st-normal","text":"The DynamoDB `TimedBackupStorage-ByteHrs` metric spike on the 1st of each month is normal behavior — it reflects front-loaded full-month charges for all carried-over backups, which decrease as backups expire or are deleted.","truth_value":"IN","source":"entries/2026/03/11/amazondynamodb-latest-developerguide-backup-restore-billinghtml.md","source_url":"","source_hash":"a5f28d3e415dca47","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"dynamodb-backup-billing-spike-1st-normal","truth_value":"IN","reason":"premise"}]}}