Re: index prefetching

From: Alexandre Felipe <o(dot)alexandre(dot)felipe(at)gmail(dot)com>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: Tomas Vondra <tomas(at)vondra(dot)me>, Peter Geoghegan <pg(at)bowt(dot)ie>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Nazir Bilal Yavuz <byavuz81(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Melanie Plageman <melanieplageman(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Georgios <gkokolatos(at)protonmail(dot)com>, Konstantin Knizhnik <knizhnik(at)garret(dot)ru>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>
Subject: Re: index prefetching
Date: 2026-03-02 18:45:03
Message-ID: CAE8JnxOQG=m_6-v-M_Nude5KRrOzAcbi2QPhySCJQ+e771BQHA@mail.gmail.com
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Andres,

> Unfortunately that has too big a performance penalty for fully cached
> workloads :(. Doing buffer mapping lookups ahead of the current point is
not
> free.

Could you elaborate?

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