Severity: Medium
Published: 3 days agoApr 23, 2026
Signal: 48

ClickHouse as a source for Data Warehouse

You can now connect ClickHouse as a source in our Data Warehouse. The import streams data in Arrow batches rather than buffering it, so multi-terabyte, multi-billion-row tables while keeping memory bounded.

Official source entry

From PostHog Changelog. The simplified record can be checked against the original wording.

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Why it matters

PostHog updated posthog changelog semantics for analytics and observability. Review the official entry during the next release review.

Who should care

backend

Affected stack

analytics
observability
experimentation