diff options
| author | Andres Freund <andres@anarazel.de> | 2025-03-30 19:14:55 -0400 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2025-03-30 19:16:47 -0400 |
| commit | 2a5e709e721cf5f890cde51755b84cfe25d1c4d9 (patch) | |
| tree | e48d7981c9ea2c20b9da99e5f78c7173875f7c68 /src/include/storage/bufmgr.h | |
| parent | ae3df4b34155d4a3811762e78d5076e64df66fba (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
Diffstat (limited to 'src/include/storage/bufmgr.h')
| -rw-r--r-- | src/include/storage/bufmgr.h | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/src/include/storage/bufmgr.h b/src/include/storage/bufmgr.h index 867ae9facb5..f2192ceb271 100644 --- a/src/include/storage/bufmgr.h +++ b/src/include/storage/bufmgr.h @@ -158,14 +158,8 @@ extern PGDLLIMPORT int bgwriter_lru_maxpages; extern PGDLLIMPORT double bgwriter_lru_multiplier; extern PGDLLIMPORT bool track_io_timing; -/* only applicable when prefetching is available */ -#ifdef USE_PREFETCH #define DEFAULT_EFFECTIVE_IO_CONCURRENCY 16 #define DEFAULT_MAINTENANCE_IO_CONCURRENCY 16 -#else -#define DEFAULT_EFFECTIVE_IO_CONCURRENCY 0 -#define DEFAULT_MAINTENANCE_IO_CONCURRENCY 0 -#endif extern PGDLLIMPORT int effective_io_concurrency; extern PGDLLIMPORT int maintenance_io_concurrency; |