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Adaptive Query Optimization in PostgreSQL: approaches and challenges

Talkat FOSDEM 2021 · on Saturday, 2021-02-06· at 15:00· D.postgresql· [databases]

Covers adaptive query optimization to improve PostgreSQL cardinality estimates by using past query execution statistics instead of precomputed histograms. Describes the original k‑nearest neighbors (kNN) based AQO, its applicability limits, and presents a new neural network–based AQO implementation along with initial experimental results.

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