From: | David Rowley <drowley(at)postgresql(dot)org> |
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To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
Subject: | pgsql: Use bump memory context for tuplesorts |
Date: | 2024-04-07 12:32:48 |
Message-ID: | E1rtRhX-000yHn-PW@gemulon.postgresql.org |
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Lists: | pgsql-committers |
Use bump memory context for tuplesorts
29f6a959c added a bump allocator type for efficient compact allocations.
Here we make use of this for non-bounded tuplesorts to store tuples.
This is very space efficient when storing narrow tuples due to bump.c
not having chunk headers. This means we can fit more tuples in work_mem
before spilling to disk, or perform an in-memory sort touching fewer
cacheline.
Author: David Rowley
Reviewed-by: Nathan Bossart
Reviewed-by: Matthias van de Meent
Reviewed-by: Tomas Vondra
Reviewed-by: John Naylor
Discussion: https://postgr.es/m/CAApHDvqGSpCU95TmM=Bp=6xjL_nLys4zdZOpfNyWBk97Xrdj2w@mail.gmail.com
Branch
------
master
Details
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https://git.postgresql.org/pg/commitdiff/6ed83d5fa55cf6e6c9d1be34ec10730c48eba763
Modified Files
--------------
src/backend/utils/sort/tuplesort.c | 52 +++++++++++++++++-------------
src/backend/utils/sort/tuplesortvariants.c | 38 +++++++++++++++++++---
src/include/utils/tuplesort.h | 21 +++++++++---
3 files changed, 78 insertions(+), 33 deletions(-)
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