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  5. Nikolay Samokhvalov: UUIDv4 vs UUIDv7: what a random primary key costs in Postgres
Nikolay Samokhvalov: UUIDv4 vs UUIDv7: what a random primary key costs in Postgres
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Nikolay Samokhvalov: UUIDv4 vs UUIDv7: what a random primary key costs in Postgres

Same table, same insert stream, three primary keys on Postgres 18. At 100M rows, UUIDv4 inserted at 0.62 to 0.69 of the rate of an ordered key on the same server, and wrote 1.5 to 1.9 times the WAL per row. Where the cost starts, and what…

DatabasesPlanet PostgreSQLPublished: November 5, 2026
Databases
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Jimmy Angelakos: PGConf.EU 2026 MEGAPOST: a busy week in Valencia

This year's PostgreSQL Conference Europe, PGConf.EU 2026, took place from October 20th to 23rd in wonderful Valencia, at the Palacio de Congresos. There was far too much going on to cover it all, so I'm just going to go over what I was…

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Ahsan Hadi: Zero Downtime In-Place Major PostgreSQL Upgrades on a Distributed PostgreSQL Cluster

In my last post I walked through a rolling major version upgrade: add a brand new node on the new version, let it join the Spock cluster, retire the old node. It works well, but it assumes you can stand up an extra server for every node…

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