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Outage in PostHog

US: Elevated errors and latency with feature flags

Resolved Minor
November 28, 2025 - Started 4 months ago - Lasted about 3 hours
Official incident page

Incident Report

We're experiencing an elevated level of latency and errors on our feature flag endpoints and are currently looking into the issue.

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Latest Updates ( sorted recent to last )
RESOLVED 4 months ago - at 11/28/2025 12:32PM

We're confident that the latest adjustment fixed the issue.

We will continue monitoring FF closely after resolution, but we don't see customer-facing impact anymore.

Thank you for the patience.

MONITORING 4 months ago - at 11/28/2025 12:16PM

The service is stable as we are applying some optimizations.

MONITORING 4 months ago - at 11/28/2025 10:45AM

We've resolved the immediate issue with the throttling and the service is back to normal.

We are still investigating further what the root cause of the congestion.

IDENTIFIED 4 months ago - at 11/28/2025 10:26AM

We identified the issue with our flags service being throttled on cpu allocations. The service has been scaled up and we have seen latency and error counts stablilise again.

We're investigating what could have led to this cpu exhaustion and will update soon.

INVESTIGATING 4 months ago - at 11/28/2025 10:02AM

We've spotted that something has gone wrong. We're currently investigating the issue, and will provide an update soon.

INVESTIGATING 4 months ago - at 11/28/2025 09:58AM

We're experiencing an elevated level of latency and errors on our feature flag endpoints and are currently looking into the issue.

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