# Sigma Computing: Snowflake tables not loading on AWS US West 2

- Impact (vendor’s label): major
- Status: resolved
- Started: 2024-09-04 14:57 UTC · Resolved: 2024-09-04 15:50 UTC · Duration: 53 min
- Updates: 4 · Affected components: AWS - Sigma - AWS (US), Sigma - AWS (US)
- [Vendor status page: https://stspg.io/kc6c8b9rgn1q](https://stspg.io/kc6c8b9rgn1q)
- [Company: Sigma Computing](https://rewindex.com/company/sigma-computing.md)

## Summary

Sigma Computing reported a major degradation affecting AWS US West 2: long-running Snowflake table queries in Sigma Workbooks could time out. Updates placed onset around 14:00 UTC on September 4, 2024; the incident record started at 14:57 UTC, with a computed duration of 52 min. Temporary mitigation proved effective; resolution was recorded at 15:50 UTC. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2024-09-04 14:31 UTC: At approximately 7 am PST, Sigma users on AWS US West experienced long running workbook queries on Snowflake tables that may result in a timeout.  This incident is now actively under investigation. We are treating this as our highest priority. Our apologies for any inconvenience caused. Impacted Cloud Regions & Services: Sigma users hosted on AWS US West  Incident Start Time: Approximately 14:00 UTC September 4, 2024
- **investigating** 2024-09-04 14:32 UTC: We are continuing to investigate this issue.
- **monitoring** 2024-09-04 14:57 UTC: Our engineers have implemented temporary mitigation measures to address the issue and we are monitoring their effect closely. Impacted Cloud Regions & Services: Sigma users hosted on AWS US West 2 User Experience: We expect the rate of errors for long running queries on Snowflake tables to decrease while working in Sigma Workbooks. Incident Start Time: Approximately 14:00 UTC September 4, 2024 Incident End Time: Approximately 14:30 UTC September 4, 2024
- **resolved** 2024-09-04 15:50 UTC: The mitigation measures have proven effective, and the issue is resolved. We will perform a root cause analysis (RCA) and publish our findings in a postmortem note to the Sigma Community site in coming days. Impacted Cloud Regions & Services: Sigma users hosted on AWS US West 2 User Experience: We expect the rate of errors to be negligible for all Sigma users hosted on AWS US West 2 Incident Start Time: Approximately 14:00 UTC September 4, 2024 Incident End Time: Approximately 14:30 UTC September 4, 2024

## Rewindex changes for this incident

- 2024-09-04 14:57 UTC: [Major incident: Snowflake tables not loading on AWS US West 2](https://rewindex.com/change/id505c8da4749f6.md)


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Canonical: https://rewindex.com/company/sigma-computing/incidents/4n6r99p9bpvk · Markdown: https://rewindex.com/company/sigma-computing/incidents/4n6r99p9bpvk.md · JSON: https://rewindex.com/api/v1/companies/sigma-computing/incidents/4n6r99p9bpvk · Generated 2026-10-18T09:37:05.888Z