diff options
| author | Andres Freund | 2025-03-18 14:52:33 +0000 |
|---|---|---|
| committer | Andres Freund | 2025-03-18 15:54:01 +0000 |
| commit | 55b454d0e14084c841a034073abbf1a0ea937a45 (patch) | |
| tree | 4bdd85a6acb02123b35bfeb1c33c1c071be30ba1 /src/test | |
| parent | 549ea06e4217aca10d3a73dc09cf5018c51bc23a (diff) | |
aio: Infrastructure for io_method=worker
This commit contains the basic, system-wide, infrastructure for
io_method=worker. It does not yet actually execute IO, this commit just
provides the infrastructure for running IO workers, kept separate for easier
review.
The number of IO workers can be adjusted with a PGC_SIGHUP GUC. Eventually
we'd like to make the number of workers dynamically scale up/down based on the
current "IO load".
To allow the number of IO workers to be increased without a restart, we need
to reserve PGPROC entries for the workers unconditionally. This has been
judged to be worth the cost. If it turns out to be problematic, we can
introduce a PGC_POSTMASTER GUC to control the maximum number.
As io workers might be needed during shutdown, e.g. for AIO during the
shutdown checkpoint, a new PMState phase is added. IO workers are shut down
after the shutdown checkpoint has been performed and walsender/archiver have
shut down, but before the checkpointer itself shuts down. See also
87a6690cc69.
Updates PGSTAT_FILE_FORMAT_ID due to the addition of a new BackendType.
Reviewed-by: Noah Misch <noah@leadboat.com>
Co-authored-by: Thomas Munro <thomas.munro@gmail.com>
Co-authored-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/uvrtrknj4kdytuboidbhwclo4gxhswwcpgadptsjvjqcluzmah%40brqs62irg4dt
Discussion: https://postgr.es/m/20210223100344.llw5an2aklengrmn@alap3.anarazel.de
Discussion: https://postgr.es/m/stj36ea6yyhoxtqkhpieia2z4krnam7qyetc57rfezgk4zgapf@gcnactj4z56m
Diffstat (limited to 'src/test')
| -rw-r--r-- | src/test/regress/expected/stats.out | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/test/regress/expected/stats.out b/src/test/regress/expected/stats.out index f77caacc17d..cd08a2ca0af 100644 --- a/src/test/regress/expected/stats.out +++ b/src/test/regress/expected/stats.out @@ -51,6 +51,14 @@ client backend|relation|vacuum client backend|temp relation|normal client backend|wal|init client backend|wal|normal +io worker|relation|bulkread +io worker|relation|bulkwrite +io worker|relation|init +io worker|relation|normal +io worker|relation|vacuum +io worker|temp relation|normal +io worker|wal|init +io worker|wal|normal slotsync worker|relation|bulkread slotsync worker|relation|bulkwrite slotsync worker|relation|init @@ -87,7 +95,7 @@ walsummarizer|wal|init walsummarizer|wal|normal walwriter|wal|init walwriter|wal|normal -(71 rows) +(79 rows) \a -- ensure that both seqscan and indexscan plans are allowed SET enable_seqscan TO on; |