Langfuse incident

Slow trace data retirival across API and UI in EU

Minor Resolved

Langfuse experienced a minor incident on October 21, 2026, lasting 58m. The incident has been resolved; the full update timeline is below.

Started
Oct 21, 2026, 07:46 AM UTC
Resolved
Oct 21, 2026, 08:45 AM UTC
Duration
58m
Detected by Pingoru
Oct 21, 2026, 07:46 AM UTC

Update timeline

  1. investigating Oct 21, 2026, 07:46 AM UTC

    Slow traces data serving across API and UI

  2. identified Oct 21, 2026, 08:31 AM UTC

    Slow clickhouse read replicas affecting performance across the service. Draining and replacing them.

  3. resolved Oct 21, 2026, 08:45 AM UTC

    All replicas look healthy again

  4. monitoring Oct 21, 2026, 08:56 AM UTC

    Looks like some timeout are still occurring. Monitoring.

  5. resolved Oct 21, 2026, 09:39 AM UTC

    should be finally resolved