Outage in PostHog
EU ingestion lag
Resolved Minor
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Outage Details
We are having some issues with our ClickHouse cluster not being able to merge parts as expected and it's leading to increased ingestion lag.
We are looking into what the root cause could be.
Components affected
PostHog Event and Data IngestionLatest Updates ( sorted recent to last )
RESOLVED
24 days ago - at 09/04/2025 06:27PM
We spotted one of our tables receiving way too many inserts and causing issues with replication inside the cluster.
We resolved that and lag is now back to normal.
INVESTIGATING
24 days ago - at 09/04/2025 04:21PM
We are having some issues with our ClickHouse cluster not being able to merge parts as expected and it's leading to increased ingestion lag.
We are looking into what the root cause could be.
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