The name is the button.

An agent writes the code now, and a human thumb hovers over Accept all a hundred times a day. The honest question of this decade is what, exactly, you just accepted. So I read the diff.

Eight years as a backend engineer in Stockholm, back in Tokyo since 2023, and I still ship something small most nights, usually badly. My one rule: the only real review of a model is the thing you built with it. That is why there is no leaderboard on this site.

Around a hundred and forty sources come through — the labs' own posts, the papers, the tools, the runtimes and languages nobody is watching yet, the chip under the demo, and the newsletters people actually forward. What is moving gets counted so the week reads at a glance, and every few days I explain one mechanism in plain words.

A story here is a headline, a short excerpt, one image and the link to whoever wrote it. We never reproduce the post; the images belong to their authors. A post written in Japanese appears in Japanese, exactly as it was published, and the link goes to the original.

— Yuki Halvorsen, Tokyo

← Accept All Archive

Mercari EngineeringJapan

メルカリにおけるTiDB改善の取り組み：IN句内100万件クエリへの対応

08.17

先日、メルカリのCoreDBをMySQLからTiDBへ移行した振り返りという記事で、MySQLからTiDBへの移行完了に関する報告と、大枠の振り返りについてお伝えしました。これから3つの記事にわたって、私たちDBRE（Database Reliability Engineering）チームが、2026年3月末までに行った改善について紹介します。

Read at Mercari Engineering ↗

One letter a week, starting soon.

Latest

メルカリにおけるTiDB改善の取り組み：IN句内100万件クエリへの対応

More from Mercari Engineering on Accept All

JapanメルカリのCoreDBをMySQLからTiDBへ移行した振り返り Mercari Engineering

Japan決済プラットフォームに常駐する自律AIエージェントの設計と運用 Mercari Engineering

JapanAI-Native な開発の実践に向けて Mercari Engineering

JapanOtoku Revolution ~ 楽しい自動値引き体験の裏側 Mercari Engineering

JapanTiDB/AlloyDBの大規模テーブルを高速にBigQueryに同期するための工夫 Mercari Engineering

Japanメルペイのキャンペーン基盤をルールベース汎用システムに書き直し、Otoku Revolutionするまでの話 Mercari Engineering