# Lingering Thoughts · Yongjie Xue

LLMS index: [llms.txt](/en/llms.txt)

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Section pages:

- [Database Guru](/en/db/): News, reports, surveys and best practices from the database industry — cutting through the marketing.
- [Journal](/en/journal/): Personal essays on life, family, finance, health, time, and self-reflection.
- [Cloud-Exiter](/en/cloud/): Stop paying the cloud tax and self-host like a pro — deep dives, cost analyses and incident write-ups.
- [Booknotes](/en/notes/): Deep dives into language, legal case studies, systems, and books.
- [PostgreSQL Mage](/en/pg/): PostgreSQL ecosystem news, plus development, operations, internals and tuning.
- [AI Explorer](/en/ai/): Everything about AI, agents, LLMs, vibe coding, AI4DB and DB4AI.
- [Travel Notes](/en/trip/): Trips, hikes and the things seen along the way.
- [Miscellaneous](/en/misc/): Essays, notes and personal writing — the things that are not about technology, or not only about it.
- [About Yongjie Xue](/en/about/): Full Stack & AI Engineer. Engineering with a writer's eye.