Fetching from the wire…
01
02
03
04
05
06
07
08
Infra2026-08-09 · source-backed
Shopify Engineering published how they moved reservations out of a dedicated Redis cluster into the same MySQL database as the inventory ledger, trading a cache for ACID transactions and eliminating the "payment succeeds but inventory isn't claimed" split-brain class entirely. The enabler is MySQL 8's SKIP LOCKED, letting transactions skip locked rows instead of waiting; reservation pools cap at 1,000 rows per item/location. Black Friday 2025 peak of $5.1M in sales per minute, up 11% YoY, with writer CPU under 50% and reader CPU under 16%. The change removed 50% of reads and 33% of transactions from the primary. Deleting a cache tier and getting faster is the kind of result that should make you re-examine your own Redis usage.
Each link below shares sources, entities, or timing with this story.
Shopify deprecates Redis / Shared entities / Earlier coverage
Linked by a graph relationship (Shopify deprecates Redis); both cover Shopify, YoY; earlier Shopify coverage from 2026-03-15.
Shopify deprecates Redis / Shared entity: Shopify / Earlier coverage / Tension
Linked by a graph relationship (Shopify deprecates Redis); both cover Shopify; earlier Shopify coverage from 2026-07-01.
Shopify deprecates Redis / Shared entities / Same source domain / Earlier coverage
Linked by a graph relationship (Shopify deprecates Redis); both cover Shopify, Shopify Engineering; reported by the same outlet (shopify.engineering).
Shopify deprecates Redis / Shared entity: Shopify / Earlier coverage / Tension
Linked by a graph relationship (Shopify deprecates Redis); both cover Shopify; earlier Shopify coverage from 2026-08-05.
Linked by a graph relationship (Shopify deprecates Redis); both cover Shopify; earlier Shopify coverage from 2026-06-27.
Shopify deprecates Redis / Shared entity: Shopify / Earlier coverage
Linked by a graph relationship (Shopify deprecates Redis); both cover Shopify; earlier Shopify coverage from 2026-07-07.
Linked by a graph relationship (Shopify deprecates Redis); both cover Shopify; earlier Shopify coverage from 2026-06-27.
Linked by a graph relationship (Shopify deprecates Redis); both cover Shopify; earlier Shopify coverage from 2026-06-14.