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  5. Alexander Ioffe: Postgres runs your query fast exactly five times. Then it changes its mind. One prepared statement, twelve EXPLAIN ANALYZE runs on one connection, a plan change on run six, and why a single run could never have shown it.
Alexander Ioffe: Postgres runs your query fast exactly five times. Then it changes its mind. One prepared statement, twelve EXPLAIN ANALYZE runs on one connection, a plan change on run six, and why a single run could never have shown it.
IM FOKUS

Alexander Ioffe: Postgres runs your query fast exactly five times. Then it changes its mind. One prepared statement, twelve EXPLAIN ANALYZE runs on one connection, a plan change on run six, and why a single run could never have shown it.

A prepared statement ran in 274 ms for five executions and 2,319 ms from the sixth, on the same connection in the same minute. One EXPLAIN ANALYZE is a sample of size one and cannot see this; twelve in a row, with the plan kept per run,…

DatenbankenPlanet PostgreSQLVeröffentlicht: 11. September 2026
Datenbanken
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DatenbankenPlanet PostgreSQL16. Sept. 2026Inhalt in der Originalsprache: Portugiesisch

Florent Jardin: Inspecting a catalog with pg_migrate

Over the past few years, I have been working on assessing the strengths and weaknesses of PostgreSQL migration tools. Several articles published by yours truly led to the ambitious project I have been pursuing since 2024 with my colleagues…

Kurzfassung ansehenOriginalartikel lesen ↗
Datenbanken
DatenbankenPlanet PostgreSQL16. Sept. 2026Inhalt in der Originalsprache: Portugiesisch

Christophe Pettus: All Your GUCs in a Row: max_locks_per_transaction

`max_locks_per_transaction` isn't about transactions or limits—it sizes the cluster-wide lock table, and its misleading name has confused PostgreSQL users for…

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Datenbanken
DatenbankenPlanet PostgreSQL15. Sept. 2026Englisch (hoher Informationsgehalt bei geringem lokalem Volumen)Inhalt in der Originalsprache: Englisch

Dimitri Fontaine: Plan Advice in PostgreSQL 19

There is a conversation that happens in every PostgreSQL shop eventually. A query that has been fine for a year gets slow overnight. Nothing was deployed. The data grew a little, ANALYZE ran, and the planner — entirely reasonably, on the…

Kurzfassung ansehenOriginalartikel lesen ↗
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