Snowflake experienced a critical incident on November 5, 2025 affecting Applications, lasting 4h 12m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Nov 05, 2025, 03:58 PM UTC
Current status: We're investigating an issue with Snowflake Data Cloud. We'll provide an update within 60 minutes. Customer experience: Customers hosted in the specified regions may be unable to access or use Snowflake services and features using Snowsight.
- identified Nov 05, 2025, 05:12 PM UTC
Current status: We've observed elevated load on a backend database that is causing intermittent errors and timeouts in Snowsight. We've identified a background maintenance process that is contributing to periodic contention and degraded performance, and we're working on a mitigation to provide relief. Customer experience: Customers hosted in the specified regions may be unable to access or use Snowflake services and features using Snowsight. ETA: An ETA is not yet available. We'll provide one as soon as possible. In the meantime, we recommend that affected customers using replication initiate their failover procedures. Incident start time: 15:27 UTC November 05, 2025
- identified Nov 05, 2025, 06:14 PM UTC
Current status: While our service health metrics indicate that impact may be occurring with less frequency, we're working to disable the background maintenance process that we've identified is contributing to the periodic contention and degraded performance of our service. We're closely monitoring our service health, and we'll provide another update within 60 minutes. Customer experience: Customers hosted in the specified regions may be unable to access or use Snowflake services and features using Snowsight. ETA: We anticipate that our mitigation action to disable the background maintenance process contributing to impact should be complete in approximately two hours. Incident start time: 15:27 UTC November 05, 2025
- monitoring Nov 05, 2025, 07:49 PM UTC
Current status: We've disabled the background maintenance process that we've identified is contributing to the periodic contention and degraded performance of our service. We're closely monitoring our service health to ensure that this continues to provide relief and impact does not return. We'll provide another update within 60 minutes. Customer experience: Customers hosted in the specified regions may have been unable to access or use Snowflake services and features using Snowsight. Incident start time: 15:27 UTC November 05, 2025 Incident end time: 18:36 UTC November 05, 2025 Preliminary root cause: A background maintenance process was contributing to periodic contention and degraded performance, resulting in elevated load on a backend database. This caused intermittent errors and timeouts in Snowsight.
- resolved Nov 05, 2025, 08:10 PM UTC
Current status: We've monitored our service health metrics after disabling the background maintenance process, and we've confirmed that this has resolved the issue. If you experience additional issues or have questions, please open a support case via Snowflake Community. Customer experience: Customers hosted in the specified regions may have been unable to access or use Snowflake services and features using Snowsight. Incident start time: 15:27 UTC November 05, 2025 Incident end time: 18:36 UTC November 05, 2025 Preliminary root cause: A background maintenance process was contributing to periodic contention and degraded performance, which resulted in elevated load on a backend database. This caused intermittent errors and timeouts in Snowsight. A root cause analysis (RCA) document will be published within five business days.
- postmortem Nov 14, 2025, 12:07 AM UTC
Snowflake Engineering has completed the postmortem of this service incident. A detailed Root Cause Analysis \(RCA\) is available on the Snowflake Community site: [https://community.snowflake.com/s/article/INC0146178](https://community.snowflake.com/s/article/INC0146178)