wehub-resource-sync
4b6817381b
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32 lines
1.6 KiB
YAML
32 lines
1.6 KiB
YAML
root_cause_category: storage_exhaustion
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required_keywords:
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- storage
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- FreeStorageSpace
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required_evidence_sources:
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- aws_rds_events
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optimal_trajectory:
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- query_grafana_metrics
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- query_grafana_logs
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- query_grafana_alert_rules
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- describe_rds_instance
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- describe_rds_events
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max_investigation_loops: 4
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model_response: |
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ROOT_CAUSE: The RDS instance ran out of storage space during a bulk INSERT archival job. FreeStorageSpace collapsed from 15 GB to 0 in 15 minutes driven by elevated WriteIOPS. The RDS control plane confirmed the outage with a "DB instance ran out of storage space" event.
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ROOT_CAUSE_CATEGORY: storage_exhaustion
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VALIDATED_CLAIMS:
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- FreeStorageSpace on orders-prod dropped monotonically from ~15 GB to ~500 MB over 15 minutes. [evidence: aws_cloudwatch_metrics]
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- WriteIOPS peaked at 8100 and then collapsed to near-zero as writes were blocked by the full disk. [evidence: aws_cloudwatch_metrics]
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- RDS event at 02:12:33Z confirmed "DB instance ran out of storage space". [evidence: aws_rds_events]
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- Performance Insights shows an INSERT archival query as the dominant load with IO:DataFileWrite as the top wait event. [evidence: aws_performance_insights]
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NON_VALIDATED_CLAIMS:
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- Expanding storage volume or enabling storage autoscaling would prevent recurrence.
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CAUSAL_CHAIN:
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- A scheduled bulk INSERT archival job ran at 02:00Z writing large volumes of data.
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- WriteIOPS sustained 6000-8100 IOPS depleting the 100 GB volume in 15 minutes.
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- FreeStorageSpace reached 0, causing the RDS engine to reject all further writes.
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- The instance entered an incompatible-restore state and stopped accepting connections.
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