$200 for 50x: The AI Reset Era Is Over
Over four months, I spent about USD 10,000 on subscriptions to run more than USD 400,000 (RMB 3 million) worth of compute at API list prices. With universal quota resets ending and multi-account …
Ruohang Feng · Database Guru · Cloud Exiter · PG Mage
Vonng’s Blog
Ruohang Feng (@Vonng): author of Pigsty, founder of PGSTY, and active OSS contributor.
Writing on Databases, Cloud-Exit & Self-Hosting, PostgreSQL Internals, and AI Agents.
Columns
Six thematic columns, each with its own dedicated RSS feed.
Database Guru
75posts
Database news, industry surveys, architecture, and best practices.
Cloud-Exiter
66posts
Cloud economics, repatriation, and building sovereign infrastructure.
Postgres Mage
128posts
PostgreSQL ecosystem, internals, extensions, and production tuning.
AI Agent Explorer
98posts
Practical engineering with coding agents, LLMs, AI4DB, and DB4AI.
Travel Notes
12posts
Trips, hikes, landscapes, and field notes across mountains and seas.
Miscellaneous
41posts
Essays, reflections, and personal writing inside and outside of tech.
Articles
The nine newest original essays, deep dives, and translations across all columns.
PostgreSQL Ecosystem Update: The AI Bug-Hunting Crunch
AI-driven vulnerability discovery has open-source maintainers scrambling to ship patches, delaying PostgreSQL 19 and triggering a wave of extension releases. This post covers OrioleDB 1.10.1, DuckDB …
Taking Over Another PostgreSQL Extension: vchord Yesterday, pg_mooncake Today
A day after taking over VectorChord, I forked pg_mooncake—restoring its documentation and blog from the Internet Archive, updating it for pg_duckdb 1.2 and pgrx 0.19.3, and shipping packages for …
Why I'm Maintaining a VectorChord Fork
Why I forked TensorChord's VectorChord (vchord), vchord_bm25, and pg_tokenizer under pgsty—what our pre-release audit uncovered, what we fixed in vchord 1.2.0, and what it takes to keep an open-source …
I Used AI to Build My Father a Digital Museum
I used AI and Oink to build a digital museum of my father's life, then started thinking about digital tombstones, copying, immortality, and how human memory might flow from stone monuments into model …
After the Attention Wall, What Keeps the AI Boom Alive?
AI coding and micro-dramas have both hit the ceiling of human attention, and personal agents cannot pick up the slack. AI for Science and embodied AI could drive the next wave, but neither will scale …
Apple's Latest: 512 GB of Gold-Plated RAM, a Touchscreen MacBook, and Tired Pricing Games
The 512 GB RAM upgrade alone costs more than a second Mac Studio, while a touchscreen MacBook, a 60 Hz iPad mini, and cracking foldable screens round out a disappointing week. Apple is still local …
AI Software Engineering: Choose Problems You Care About
AI has driven the cost of prototyping software down to nearly zero, leaving conviction, verification, and long-term maintenance as the real bottlenecks. The first rule of choosing what to build is …
MinIO's One-Year Memorial: How to Revive a Dead Open-Source Project
One year after open-source MinIO was archived, how Silo uses AI agents, production user feedback, and strict scope boundaries to patch vulnerabilities, restore the web console, and maintain drop-in …
Open Source
Nine open-source projects across PostgreSQL RDS, S3 object storage, package management, local VMs, and developer ergonomics.
Pigsty
A battery-included PostgreSQL distribution — the local-first, free and open-source RDS alternative.
SILO
The community-maintained MinIO fork that keeps high-performance S3-compatible object storage genuinely open source.
OINK
A local-first, zero-external-dependency Hugo theme for engineering documentation, books, and technical blogs.
PIG
One command, any PostgreSQL extension — native RPM and DEB package management across EL, Debian, and Ubuntu.
SOW
Store once, serve everywhere — one self-contained binary for building, snapshotting, and publishing APT and YUM repos.
pg_exporter
PostgreSQL observability expressed in SQL — 600+ metrics via declarative YAML collectors for Prometheus.
Barn
Boot multi-node Linux labs from a single YAML inventory, or run isolated native macOS VMs on Apple Silicon.
Capslock
Turn the forgotten CapsLock key into a fifth modifier (Hyper) for sixteen home-row keyboard control planes.
ACDAT
Zero-dependency C11 PostgreSQL extension compiling large literal pattern sets into a Double-Array Trie for O(n) scanning.Works
Original monographs on production PostgreSQL and comparative philosophy, alongside research papers on LLM-powered database diagnosis and heterogeneous data federation.
36 Stratagems of PostgreSQL
From SQL to Production: a 36-chapter, 242-section engineering monograph built on PostgreSQL 18.6 and Pigsty 4.5 with reproducible labs.
Cyber Dharma (赛博经藏)
Seven ancient contemplative traditions orbiting one modern machine — a bilingual canon translating timeless wisdom into AI Agent governance.
D-Bot: Database Diagnosis System using Large Language Models
Co-authored with the Tsinghua University database group (VLDB 2024): collaborative LLM agents with tool use and knowledge retrieval for automated root-cause diagnosis.
Unified Access Layer with PostgreSQL FDW for Heterogeneous Databases
Published at IFIP NPC 2017 (Springer LNCS Vol. 10578): federating HBase, Redis, MongoDB, and MySQL behind a unified SQL interface via PostgreSQL Foreign Data Wrappers.Translations
Chinese translations of distributed systems and PostgreSQL classics, tutorials, and official training curricula.
DDIA
Chinese translation of Martin Kleppmann’s Designing Data-Intensive Applications (2nd Edition) — the distributed systems classic.
Internals of PostgreSQL
Chinese edition of Hironobu Suzuki’s classic guide to PostgreSQL storage layout, query execution, MVCC, and WAL.
PostgreSQL 18 Internals
Chinese edition of Egor Rogov’s comprehensive volume on PostgreSQL 18 concurrency, buffer management, locks, and access methods.
PostgreSQL Monitoring
Chinese edition of Alexey Lesovsky’s handbook on PostgreSQL statistics views, I/O telemetry, lock analysis, and OS profiling.
PostgreSQL 18 Query Optimization
Chinese edition of Pavel Tolmachev’s query optimization handbook covering access methods, join strategies, statistics, and tuning.
PostgreSQL New Features
Chinese edition of Noriyoshi Shinoda’s guide to new features, SQL examples, and compatibility changes across 12 major PG releases.
PostgreSQL: First Experience
Chinese edition of Pavel Luzanov et al.’s beginner guide — from installing PostgreSQL and writing SQL to connecting applications.
PostgreSQL by Example
Chinese edition of Dariush Abbasi’s Postgres by Example — 57 concise, runnable SQL lessons from queries to administration.
PostgreSQL Basics (8KB)
Chinese edition of Chase Pierce’s Eight Kilobytes — understanding PostgreSQL from 8 KB disk pages and tuples to production ops.
Dalibo PostgreSQL Training Courses
Dalibo · 14 Courses
Open-access PostgreSQL training curriculum by French consultancy Dalibo, spanning core DBA operations, Patroni HA, performance tuning, and CloudNativePG:
PostgreSQL Pro Training Courses
Postgres Pro · 8 Courses
Eight structured training courses from Postgres Professional (134 topics and 5,300+ slide/workbook pages) covering administration, security, and backend development:
Sites
Core PostgreSQL knowledge portals, extension catalogs, and open-source project websites.
pg.center
Connected PostgreSQL manuals, GUC parameters, system catalogs, and 500+ extension references across versions.
pgsql.cc
Chinese PostgreSQL community portal with synchronized manuals, daily news, version comparisons, books, and tutorials.
pgext.cloud
An index, catalog, and metadata registry for 2,200+ PostgreSQL extensions, with binary packages and build matrices for 570+ of them.
vonng.com
Ruohang Feng’s personal website and long-form engineering columns on databases, cloud repatriation, PostgreSQL internals, and AI agents.
pigsty
Official documentation and portal for Pigsty — the battery-included, local-first open-source PostgreSQL RDS distribution.
pgsty.com
The studio behind Pigsty, delivering open-source PostgreSQL infrastructure, enterprise subscriptions, and consulting services.Questions, or just want to talk?Leave a comment under any article, subscribe via RSS, or reach out directly.