[NEWSLETTER]score: 0.60
AI Agent Finds 3-Year-Old ClickHouse Bug, Cuts Granule Scans 62%
June 3, 2026
PostHog deployed an AI agent on slow production queries overnight and it identified a ClickHouse primary key misuse on timestamp-filtered queries that had persisted for three years. The fix reduced granule scans by 62% and improved query performance by 11%.
HOW THIS AFFECTS YOU
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builderWorth watching as a concrete example of AI agents providing measurable value on production database optimization — a pattern you can replicate with your own ClickHouse or query-heavy systems.