# How Shopify Uses MySQL for Oversell Protection at Scale

DevFeed: [How Shopify Uses MySQL for Oversell Protection at Scale](<https://devfeed.tech/articles/shopify-said-mysql-redis-18132.md>)

Original publisher: [Read original article](<https://hungrymindsdev.substack.com/p/shopify-said-mysql-redis>)

Author: Alexandre Zajac

Published: 2026-06-22T15:30:09Z

Content type: article

Language: en

Sources: [Hungry Minds](<https://devfeed.tech/sources/hungry-minds.md>)

Topics: [MySQL](<https://devfeed.tech/topics/mysql.md>), [Database](<https://devfeed.tech/topics/database.md>), [Concurrency](<https://devfeed.tech/topics/concurrency.md>), [Deadlock](<https://devfeed.tech/topics/deadlock.md>), [Redis](<https://devfeed.tech/topics/redis.md>), [Transactions](<https://devfeed.tech/topics/transactions.md>)

Tags: [concurrent](<https://devfeed.tech/tags/concurrent.md>), [database](<https://devfeed.tech/tags/database.md>), [deadlock](<https://devfeed.tech/tags/deadlock.md>), [mysql](<https://devfeed.tech/tags/mysql.md>), [redis](<https://devfeed.tech/tags/redis.md>), [transactions](<https://devfeed.tech/tags/transactions.md>)

## AI overview

The article describes Shopify's inventory oversell protection challenge and implementation techniques centered on MySQL, including bounded row pools, composite primary keys, READ COMMITTED isolation, consistent lock ordering, and shadow-mode migration from Redis. It emphasizes concurrency, ACID guarantees, and production-scale reservation handling.

## Source excerpt

PLUS: SpaceX buys Cursor for $60B 💰, AWS Blocks framework launch ⚡, Terminal optimization tips 👨💻