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config: Split "Worker Processes" out of "Asynchronous Behavior"

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Having all the worker related GUCs in the same section as IO controlling GUCs
doesn't really make sense. Create a separate section for them.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/x3tlw2jk5gm3r3mv47hwrshffyw7halpczkfbk3peksxds7bvc@lguk43z3bsyq
This commit is contained in:
Andres Freund
2025-02-11 11:39:19 -05:00
parent c366d2bdba
commit 740766d37c
4 changed files with 16 additions and 5 deletions
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6
doc/src/sgml/config.sgml
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@ -2618,7 +2618,13 @@ include_dir 'conf.d'
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 id="runtime-config-resource-worker-processes">
<title>Worker Processes</title>
<variablelist>
<varlistentry id="guc-max-worker-processes" xreflabel="max_worker_processes">
<term><varname>max_worker_processes</varname> (<type>integer</type>)
<indexterm>

11
src/backend/utils/misc/guc_tables.c
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@ -683,6 +683,7 @@ const char *const config_group_names[] =
[RESOURCES_KERNEL] = gettext_noop("Resource Usage / Kernel Resources"),
[RESOURCES_BGWRITER] = gettext_noop("Resource Usage / Background Writer"),
[RESOURCES_ASYNCHRONOUS] = gettext_noop("Resource Usage / Asynchronous Behavior"),
[RESOURCES_WORKER_PROCESSES] = gettext_noop("Resource Usage / Worker Processes"),
[WAL_SETTINGS] = gettext_noop("Write-Ahead Log / Settings"),
[WAL_CHECKPOINTS] = gettext_noop("Write-Ahead Log / Checkpoints"),
[WAL_ARCHIVING] = gettext_noop("Write-Ahead Log / Archiving"),
@ -1962,7 +1963,7 @@ struct config_bool ConfigureNamesBool[] =
},
{
{"parallel_leader_participation", PGC_USERSET, RESOURCES_ASYNCHRONOUS,
{"parallel_leader_participation", PGC_USERSET, RESOURCES_WORKER_PROCESSES,
gettext_noop("Controls whether Gather and Gather Merge also run subplans."),
gettext_noop("Should gather nodes also run subplans or just gather tuples?"),
GUC_EXPLAIN
@ -3234,7 +3235,7 @@ struct config_int ConfigureNamesInt[] =
{
{"max_worker_processes",
PGC_POSTMASTER,
RESOURCES_ASYNCHRONOUS,
RESOURCES_WORKER_PROCESSES,
gettext_noop("Maximum number of concurrent worker processes."),
NULL,
},
@ -3496,7 +3497,7 @@ struct config_int ConfigureNamesInt[] =
},
{
{"max_parallel_maintenance_workers", PGC_USERSET, RESOURCES_ASYNCHRONOUS,
{"max_parallel_maintenance_workers", PGC_USERSET, RESOURCES_WORKER_PROCESSES,
gettext_noop("Sets the maximum number of parallel processes per maintenance operation."),
NULL
},
@ -3506,7 +3507,7 @@ struct config_int ConfigureNamesInt[] =
},
{
{"max_parallel_workers_per_gather", PGC_USERSET, RESOURCES_ASYNCHRONOUS,
{"max_parallel_workers_per_gather", PGC_USERSET, RESOURCES_WORKER_PROCESSES,
gettext_noop("Sets the maximum number of parallel processes per executor node."),
NULL,
GUC_EXPLAIN
@ -3517,7 +3518,7 @@ struct config_int ConfigureNamesInt[] =
},
{
{"max_parallel_workers", PGC_USERSET, RESOURCES_ASYNCHRONOUS,
{"max_parallel_workers", PGC_USERSET, RESOURCES_WORKER_PROCESSES,
gettext_noop("Sets the maximum number of parallel workers that can be active at one time."),
NULL,
GUC_EXPLAIN

3
src/backend/utils/misc/postgresql.conf.sample
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@ -198,6 +198,9 @@
#effective_io_concurrency = 1 # 1-1000; 0 disables prefetching
#maintenance_io_concurrency = 10 # 1-1000; 0 disables prefetching
#io_combine_limit = 128kB # usually 1-32 blocks (depends on OS)
# - Worker Processes -
#max_worker_processes = 8 # (change requires restart)
#max_parallel_workers_per_gather = 2 # limited by max_parallel_workers
#max_parallel_maintenance_workers = 2 # limited by max_parallel_workers

1
src/include/utils/guc_tables.h
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@ -65,6 +65,7 @@ enum config_group
RESOURCES_KERNEL,
RESOURCES_BGWRITER,
RESOURCES_ASYNCHRONOUS,
RESOURCES_WORKER_PROCESSES,
WAL_SETTINGS,
WAL_CHECKPOINTS,
WAL_ARCHIVING,