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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