From: David Rowley <drowley@postgresql.org>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Doc: mention executor memory usage for enable_partitionwise* GUC
Date: Wed, 31 Jul 2024 13:27:11 +0000
Message-ID: <E1sZ9MF-0022JT-Sh@gemulon.postgresql.org> (raw)
Doc: mention executor memory usage for enable_partitionwise* GUCs
Prior to this commit, the docs for enable_partitionwise_aggregate and
enable_partitionwise_join mentioned the additional overheads enabling
these causes for the query planner, but they mentioned nothing about the
possible surge in work_mem-consuming executor nodes that could end up in
the final plan. Dimitrios reported the OOM killer intervened on his
query as a result of using enable_partitionwise_aggregate=on.
Here we adjust the docs to mention the possible increase in the number of
work_mem-consuming executor nodes that can appear in the final plan as a
result of enabling these GUCs.
Reported-by: Dimitrios Apostolou
Reviewed-by: Ashutosh Bapat
Discussion: https://postgr.es/m/3603c380-d094-136e-e333-610914fb3e80%40gmx.net
Discussion: https://postgr.es/m/CAApHDvoZ0_yqwPFEpb6h261L76BUpmh5GxBQq0LeRzQ5Jh3zzg@mail.gmail.com
Backpatch-through: 12, oldest supported version
Branch
------
REL_16_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/a459e583e06b640597c2e24ab6043a0701a5a545
Modified Files
--------------
doc/src/sgml/config.sgml | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: drowley@postgresql.org, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Doc: mention executor memory usage for enable_partitionwise* GUC
In-Reply-To: <E1sZ9MF-0022JT-Sh@gemulon.postgresql.org>
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