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mirror of https://github.com/postgres/postgres.git synced 2025-10-15 05:46:52 +03:00

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
This commit is contained in:
Andres Freund
2025-03-30 19:14:55 -04:00
parent ae3df4b341
commit 2a5e709e72
10 changed files with 14 additions and 67 deletions

View File

@@ -361,11 +361,7 @@ static relopt_int intRelOpts[] =
RELOPT_KIND_TABLESPACE,
ShareUpdateExclusiveLock
},
#ifdef USE_PREFETCH
-1, 0, MAX_IO_CONCURRENCY
#else
0, 0, 0
#endif
},
{
{
@@ -374,11 +370,7 @@ static relopt_int intRelOpts[] =
RELOPT_KIND_TABLESPACE,
ShareUpdateExclusiveLock
},
#ifdef USE_PREFETCH
-1, 0, MAX_IO_CONCURRENCY
#else
0, 0, 0
#endif
},
{
{