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PostgreSQL 18 UUIDv7: Better Primary Keys — ContentBuffer guide

PostgreSQL 18 UUIDv7: Better Primary Keys

K
Kodetra Technologies··8 min read Intermediate

Summary

Use Postgres 18 uuidv7() for ordered primary keys, smaller indexes, fewer page splits.

Why this matters now

Postgres 18 finally shipped uuidv7() as a built-in function. It looks like a small addition next to async I/O and OAuth login, but it solves a real production problem that has been costing teams disk space and write throughput for a decade: random UUIDv4 primary keys destroy B-tree locality.

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#postgresql #uuidv7 #database #primary keys #indexing

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