Observed arrival · 2026-10-14
Culprit SQL turns query evidence into a diagnosis
A free, open-source desktop app, CLI and MCP server that diagnoses slow queries across SQL Server, PostgreSQL, MySQL and MariaDB.
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Developers diagnosing SQL performance problems
- Worth noticing
- Its sample diagnosis traces a slow query to 1.5 million repeated reads and suggests removing an OPTION (LOOP JOIN) hint.
Field notes
The displayed diagnosis attributes a slow read of order_items to a loop join that repeats 1.5 million times, then proposes removing OPTION (LOOP JOIN) and checking actual rows. The page describes agent permissions that can be disabled or limited to statistics and plans by default; individually approved queries are shown before execution and described as read-only, rolled back, and capped by rows and time.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue