Sigma Computing outage, 4 August 2026

Materialization cleanup delayed for Sigma users on AWS US-West-2

Started
Resolved
5 Aug 2026, 03:19 UTC (after 3 h 20 min)
Impact
Not stated
Affected
Sigma - AWS (US)

Last update from Sigma Computing

The mitigation measures have proven effective, and the issue has been resolved. We will perform a root cause analysis (RCA) and publish our findings in a postmortem note in the coming days. We apologize for any inconvenience this may have caused. Impacted Cloud Regions & Services: Sigma users hosted on AWS US-West-2 using materialization User Experience: Customers using materializations on AWS US-West-2 should no longer see the previously reported table accumulation. Incident Start Time: Approximately August 3, 2026, at 2:44 PM UTC Incident End Time: Approximately August 5, 2026, at 02:40 AM UTC

5 Aug 2026, 03:19 UTC

Read the full incident on the official Sigma Computing status page

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