Outage in PostHog US

Performance degraded in US

Resolved Major

August 21, 2025 - Started 9 months ago - Lasted about 2 hours
Official incident page

Incident Report

Our ClickHouse cluster is pretty loaded right now and queries may be pretty slow to complete or not be able to complete at all. We are investigating what could be the issue.

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Latest Updates ( sorted recent to last )

RESOLVED 9 months ago - at 08/21/2025 06:45PM

Batch exports caught up and everything is now back to normal.

MONITORING 9 months ago - at 08/21/2025 06:23PM

We fixed the root cause that was exhausting ClickHouse connections and we are now recovering.

Ingestion lag is fully recovered, and queries are starting to respond as usual again.

We are still monitoring batch exports.

INVESTIGATING 9 months ago - at 08/21/2025 04:47PM

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

INVESTIGATING 9 months ago - at 08/21/2025 04:38PM

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

INVESTIGATING 9 months ago - at 08/21/2025 04:37PM

Our ClickHouse cluster is pretty loaded right now and queries may be pretty slow to complete or not be able to complete at all.

We are investigating what could be the issue.

Latest PostHog US outages

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Phishing emails sent via PostHog invite system - 11 days ago

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Analytics: query timeouts/failures - 26 days ago

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