Is Langfuse down? › Outage history › Sep 30, 2026
Langfuse partial outage on Sep 30, 2026: what happened
On Sep 30, 2026, the Langfuse status page reported "Degraded ingestion for 20 projects". About 6 hours 20 min: from Sep 30, 2026, 09:10 UTC to Sep 30, 2026, 15:30 UTC, by the official start and resolution times.
Langfuse right now
At our last refresh (Oct 22, 2026, 12:35 UTC) Langfuse was up: All Systems Operational.
- Started
- Sep 30, 2026, 09:10 UTC
- Resolved
- Sep 30, 2026, 15:30 UTC
- Duration
- 6 hours 20 min
- Official impact
- Major
- Source
- Degraded ingestion for 20 projects on the Langfuse status page
The Langfuse status page rated the impact "Major": a partial outage. Some parts or some users were affected; it was not a complete outage.
What caused the Langfuse partial outage?
The Langfuse status page has not published a cause. When it identified the problem at 09:10 UTC on Sep 30, 2026, it said: "S3 backpressure leads to S3 "please slow down" errors across projects with cm* prefix"
When was it fixed?
The Langfuse status page marked it resolved at Sep 30, 2026, 15:30 UTC, 6 hours 20 min after it started. A fix was in place and being monitored from Sep 30, 2026, 09:43 UTC. Its resolution note: "All projects ingesting as normal"
Timeline of official updates
Every update the Langfuse status page posted, oldest first. Times are UTC.
Sep 30, 2026, 09:10 UTC identified
S3 backpressure leads to S3 "please slow down" errors across projects with cm* prefix
Sep 30, 2026, 09:43 UTC monitoring
Offending workload was isolated, performance should be back to normal for other projects
Sep 30, 2026, 15:30 UTC resolved
All projects ingesting as normal
Langfuse partial outage questions
What caused the Langfuse partial outage on Sep 30, 2026?
The Langfuse status page has not published a cause. When it identified the problem (Sep 30, 2026, 09:10 UTC) it said: "S3 backpressure leads to S3 "please slow down" errors across projects with cm* prefix"
When was the Langfuse partial outage on Sep 30, 2026 fixed?
The Langfuse status page marked it resolved at Sep 30, 2026, 15:30 UTC, 6 hours 20 min after it started. A fix was in place and being monitored from Sep 30, 2026, 09:43 UTC. Its resolution note: "All projects ingesting as normal"
How long did the Langfuse partial outage last?
About 6 hours 20 min: from Sep 30, 2026, 09:10 UTC to Sep 30, 2026, 15:30 UTC, by the official start and resolution times.
Was Langfuse completely down?
No. The Langfuse status page rated the impact "Major": a partial outage. Some parts or some users were affected; it was not a complete outage.
Other recent Langfuse incidents
- Slow trace data retirival across API and UI in EU Oct 21, 2026, 07:46 UTC, 59 minutes
- Degraded performance in Halo (Langfuse Assistant) Oct 20, 2026, 17:03 UTC, 48 minutes
- Degraded data serving in EU Oct 20, 2026, 15:54 UTC, 26 minutes
- Degraded public API performance Oct 19, 2026, 10:01 UTC, 45 minutes
- Elevated error rates in In App Agent Sep 23, 2026, 13:36 UTC, 7 minutes
- OTEL ingestion queue delay over 10 minutes in US Sep 16, 2026, 20:20 UTC, 1 hour 12 min
Full Langfuse outage history and biggest outages → · Recent outages across all services →
Quotes are the Langfuse status page's own words, from the official incident. Is It Up or Down is independent and not affiliated with Langfuse. Times are UTC.