Migration safety insights for Postgres teamshttps://pgfence.com/https://pgfence.com/blog/lock-timeout-death-spiral/https://pgfence.com/blog/lock-timeout-death-spiral/Your migration grabs an ACCESS EXCLUSIVE lock. It queues behind a long-running query. Every new connection piles up behind it. In 30 seconds, your entire database is frozen. Here's the fix.Fri, 20 Mar 2026 00:00:00 GMThttps://pgfence.com/blog/pgfence-0-4-1-trust-contract-hardening/https://pgfence.com/blog/pgfence-0-4-1-trust-contract-hardening/We audited every rule, extractor, and reporter in pgfence and fixed 18 silent failure paths, 6 bugs, and 11 stale comments. Here is what we found and what we fixed.Mon, 16 Mar 2026 00:00:00 GMThttps://pgfence.com/blog/pgfence-0-4-trace-mode/https://pgfence.com/blog/pgfence-0-4-trace-mode/pgfence can now execute migrations against a real Postgres instance and verify lock predictions against observed behavior. It spins up a disposable Docker container and traces statements one by one.Sat, 14 Mar 2026 00:00:00 GMThttps://pgfence.com/blog/false-negatives-silent-killer/https://pgfence.com/blog/false-negatives-silent-killer/Your migration linter says everything is safe. It's wrong. Here's why false negatives are more dangerous than false positives, and what we do about it.Tue, 10 Mar 2026 00:00:00 GMThttps://pgfence.com/blog/pgfence-0-3-vs-code-extension/https://pgfence.com/blog/pgfence-0-3-vs-code-extension/pgfence now runs inside your editor. Real-time diagnostics, quick fixes for supported safe rewrites, and hover info for SQL migrations. Plus new rules for char fields, serial columns, DROP DATABASE, and domain constraints.Fri, 06 Mar 2026 00:00:00 GMThttps://pgfence.com/blog/expand-contract-zero-downtime-migrations/https://pgfence.com/blog/expand-contract-zero-downtime-migrations/Step-by-step SQL sequences for the five most common dangerous migrations. No downtime, no blocked queries, no surprises.Thu, 05 Mar 2026 00:00:00 GMThttps://pgfence.com/blog/pglt-plus-pgfence-complete-migration-safety/https://pgfence.com/blog/pglt-plus-pgfence-complete-migration-safety/Postgres Language Server validates SQL correctness. pgfence adds lock and migration-safety analysis. Here's how to run both in CI for broader migration coverage.Fri, 27 Feb 2026 00:00:00 GMThttps://pgfence.com/blog/typeorm-migrations-are-dangerous/https://pgfence.com/blog/typeorm-migrations-are-dangerous/TypeORM's migration generator doesn't understand Postgres lock modes. Here's what that means for your production database and how to catch problems before they ship.Wed, 25 Feb 2026 00:00:00 GMThttps://pgfence.com/blog/postgres-lock-mode-cheat-sheet/https://pgfence.com/blog/postgres-lock-mode-cheat-sheet/A plain-English reference for the eight PostgreSQL lock modes, which DDL statements trigger them, and what they actually block in production.Mon, 23 Feb 2026 00:00:00 GMThttps://pgfence.com/blog/how-add-column-took-down-our-table/https://pgfence.com/blog/how-add-column-took-down-our-table/A war story about a volatile-default footgun, why ORMs hide it from you, and the staged rollout pattern that prevents it.Sun, 22 Feb 2026 00:00:00 GMT