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The Hidden Cost of Postgres Constraints at Scale

Hacker Noon

TechnologyHacker Noon·Jul 29, 2026·1 min read

The Hidden Cost of Postgres Constraints at Scale

Your ingest workers are queuing. pg_stat_activity shows lock waits. The blocked query is not a slow SELECT. It's your bulk INSERT, waiting on the devices table. You added a FOREIGN KEY there months ago. You added a UNIQUE constraint on the…

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