For backend engineers: make slow queries fast and keep production Postgres healthy. — built in-house by Skill Me.
Reach for this when a production database is slow or strained and you need a verifiable fix, not folklore. It walks the real diagnose-to-resolve path: catch N+1s in your ORM, read an EXPLAIN plan down to the bottleneck node, advise the right index, rewrite pathological SQL, decide when to partition, size connection pools, ship migrations with zero-downtime locking, and chase down stale reads from replica lag. Every fix is EXPLAIN-checkable, so you ship the change knowing it actually moved the number.
⭐ If this is useful, star the repo — it's how we gauge what to build next.
- From the catalog: skillme.dev/pack/database-performance — install the whole pack into Claude in one step.
- With the skills CLI:
npx skills add SkillMedev/database-performance - Manually: copy any
skills/<slug>/SKILL.mdinto your Claude skills directory.
- N+1 Query Hunter — Detect ORM loop-of-queries (N+1) patterns from query logs and eliminate them with batched eager loading, keeping the N+1s that are cheap.
- EXPLAIN Plan Reader — Read a captured EXPLAIN ANALYZE plan, name the single bottleneck node, and prescribe a targeted fix for it.
- Index Advisor — Recommends, orders, and prunes indexes for a specific query or table - composite column order, selectivity rules, partial and covering indexes, duplicate/unused cleanup, and write-amplification tradeoffs.
- SQL Query Rewriter — Rewrites a structurally inefficient SQL query into a faster equivalent that returns identical results - correlated subqueries to joins or LATERAL, accidental cross joins to explicit ON predicates, OR-across-columns to UNION, SELECT * to projected columns, and deep OFFSET pagination to keyset.
- Table Partition Planner — Produces a partitioning or sharding plan for an oversized table - range/list/hash strategy, partition-key choice, composite-key and pruning constraints, and a verdict on whether to partition at all.
- Connection Pool Tuner — Diagnoses connection pool exhaustion from captured evidence and sets correct pool sizes and timeouts across app pools and PgBouncer.
- Migration Safety Checker — Rewrite a schema migration into independently deployable, zero-downtime steps that never take a long-held blocking lock on a live table.
- Replication Lag Debugger — Diagnoses read-replica lag and the stale-read bugs it causes, then applies read-after-write consistency strategies to fix them.
MIT — see LICENSE. Skills are portable SKILL.md files; the canonical
copies live in the Skill Me catalog.