Horton

HOT readme missing documentation on summarizing index handling

Matthias van de Meent <boekewurm+postgres@gmail.com>

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From: Matthias van de Meent <boekewurm+postgres@gmail.com>
To: Tomas Vondra <tomas.vondra@enterprisedb.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2023-07-06T11:40:31Z
Lists: pgsql-hackers

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Hi,

With PG16's 19d8e230, we got rid of BRIN's blocking of HOT updates,
but I just realized that we failed to update the README.HOT document
with this new exception for summarizing indexes.

Attached a patch that updates that document, detailing the related rationale.

I'm not sure if such internal documentation is relevant for
backpatching, but I also don't think it woudl hurt to have this
included in the REL_16_STABLE branch.

Kind regards,

Matthias van de Meent
Neon (https://neon.tech/)

Commits

  1. Document relaxed HOT for summarizing indexes