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The 81% Query Plan Jump: How Training Small Models is Rewriting the Rules of Database Performance

This story is from 2026-09-17. It is preserved in the archive; the latest stories are on the live feed.

Originally published on tamiz.pro . Modern databases rely on cost-based optimizers (CBOs) to pick the fastest way to execute a SQL query. These optimizers estimate the number of rows flowing through each operator of a query plan — a step called cardinality estimation . Historically, CBOs used histo…

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  1. 2026-09-17 00:00 · DEV Community — AI
    The 81% Query Plan Jump: How Training Small Models is Rewriting the Rules of Database Performance

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