Thread: pgsql: Document relaxed HOT for summarizing indexes

Document relaxed HOT for summarizing indexes

Commit 19d8e2308b allowed a weaker check for HOT with summarizing
indexes, but it did not update README.HOT. So do that now.

Patch by Matthias van de Meent, minor changes by me. Backpatch to 16,
where the optimization was introduced.

Author: Matthias van de Meent
Reviewed-by: Tomas Vondra
Backpatch-through: 16
Discussion: https://postgr.es/m/CAEze2WiEOm8V+c9kUeYp2BPhbEc5s473fUf51xNeqvSFGv44Ew@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/ec99d6e9c87a8ff0f4805cc0c6c12cbb89c48e06

Modified Files
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src/backend/access/heap/README.HOT | 63 +++++++++++++++++++++++++-------------
1 file changed, 42 insertions(+), 21 deletions(-)