MonPG Labs

PostgreSQL Diagnostic Tools

A small set of incident-grade tools for teams who need evidence, rollout discipline, and a defensible next move. We keep this list intentionally short.

pgvector HNSW Index Tuner

Benchmark 48 HNSW configurations against your real pgvector data in 10 minutes. Get the optimal m, ef_construction, and ef_search plus zero-downtime migration SQL.

HNSW Tuning LabOpen tool

PostgreSQL Plan Autopsy

Paste EXPLAIN ANALYZE output and get an incident-style read of the plan: planner estimate drift, loop explosions, disk spills, buffer pressure, and the evidence SQL to prove the fix.

Plan AutopsyOpen tool

PostgreSQL Index Rollout Simulator

Model a proposed PostgreSQL index as a production rollout: DDL shape, lock level, WAL pressure, write amplification, replica lag risk, validation SQL, and rollback criteria.

Index RolloutOpen tool