Re: index prefetching

From: Peter Geoghegan <pg(at)bowt(dot)ie>
To: Tomas Vondra <tomas(at)vondra(dot)me>
Cc: Nazir Bilal Yavuz <byavuz81(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, 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: 2025-07-22 17:50:16
Message-ID: CAH2-Wzk0d+fdfMTwUx8friA7NFoSh=JJOb9qXaD2_dXsuuue3A@mail.gmail.com
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On Tue, Jul 22, 2025 at 1:35 PM Peter Geoghegan <pg(at)bowt(dot)ie> wrote:
> I attach pgbench_accounts_pkey_nhblks.txt, which shows a query that
> (among other things) ouputs "nhblks" for each leaf page from a given
> index (while showing the details of each leaf page in index key space
> order).

I just realized that my terminal corrupted the SQL query (but not the results).

Attached is a valid and complete version of the same query.

--
Peter Geoghegan

Attachment Content-Type Size
leafkeyspace.sql application/octet-stream 2.9 KB

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