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Enable IO concurrency on all systems

author Andres Freund <andres@anarazel.de>

2025年3月30日 23:14:55 +0000 (19:14 -0400)

committer Andres Freund <andres@anarazel.de>

2025年3月30日 23:16:47 +0000 (19:16 -0400)

commit 2a5e709e721cf5f890cde51755b84cfe25d1c4d9

tree e48d7981c9ea2c20b9da99e5f78c7173875f7c68 tree

parent ae3df4b34155d4a3811762e78d5076e64df66fba commit | diff

Enable IO concurrency on all systems

Previously effective_io_concurrency and maintenance_io_concurrency could not
be set above 0 on machines without fadvise support. AIO enables IO concurrency
without such support, via io_method=worker.

Currently only subsystems using the read stream API will take advantage of
this. Other users of maintenance_io_concurrency (like recovery prefetching)
which leverage OS advice directly will not benefit from this change. In those
cases, maintenance_io_concurrency will have no effect on I/O behavior.

Author: Melanie Plageman <melanieplageman@gmail.com>
Reviewed-by: Noah Misch <noah@leadboat.com>
Discussion: https://postgr.es/m/CAAKRu_atGgZePo=_g6T3cNtfMf0QxpvoUh5OUqa_cnPdhLd=gw@mail.gmail.com

doc/src/sgml/config.sgml diff | blob | blame | history

doc/src/sgml/ref/alter_tablespace.sgml diff | blob | blame | history

doc/src/sgml/ref/create_tablespace.sgml diff | blob | blame | history

src/backend/access/common/reloptions.c diff | blob | blame | history

src/backend/commands/variable.c diff | blob | blame | history

src/backend/utils/misc/guc_tables.c diff | blob | blame | history

src/backend/utils/misc/postgresql.conf.sample diff | blob | blame | history

src/bin/initdb/initdb.c diff | blob | blame | history

src/include/storage/bufmgr.h diff | blob | blame | history

src/include/utils/guc_hooks.h diff | blob | blame | history

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