diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2019-03-10 15:05:25 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2019-03-10 15:05:25 -0400 |
| commit | 52985e4fea75f1ec742742f27e246a8775c99e08 (patch) | |
| tree | 62fa920f72ec9b5b92e0562c46a1a1619b2ec478 /src | |
| parent | caf626b2cd471615914986f18282c03c8282a1f4 (diff) | |
| download | postgresql-52985e4fea75f1ec742742f27e246a8775c99e08.tar.gz postgresql-52985e4fea75f1ec742742f27e246a8775c99e08.zip | |
Revert "Increase the default vacuum_cost_limit from 200 to 2000"
This reverts commit bd09503e633b8077822bb4daf91625b71ac16253.
Per discussion, it seems like what we should do instead is to
reduce the default value of autovacuum_vacuum_cost_delay by the
same factor. That's functionally equivalent as long as the
platform can accurately service the smaller delay request, which
should be true on anything released in the last 10 years or more.
And smaller, more-closely-spaced delays are better in terms of
providing a steady I/O load.
Discussion: https://postgr.es/m/28720.1552101086@sss.pgh.pa.us
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/utils/init/globals.c | 2 | ||||
| -rw-r--r-- | src/backend/utils/misc/guc.c | 2 | ||||
| -rw-r--r-- | src/backend/utils/misc/postgresql.conf.sample | 2 |
3 files changed, 3 insertions, 3 deletions
diff --git a/src/backend/utils/init/globals.c b/src/backend/utils/init/globals.c index 6d1e94f8171..a5950c1e8c2 100644 --- a/src/backend/utils/init/globals.c +++ b/src/backend/utils/init/globals.c @@ -137,7 +137,7 @@ int MaxBackends = 0; int VacuumCostPageHit = 1; /* GUC parameters for vacuum */ int VacuumCostPageMiss = 10; int VacuumCostPageDirty = 20; -int VacuumCostLimit = 2000; +int VacuumCostLimit = 200; double VacuumCostDelay = 0; int VacuumPageHit = 0; diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c index 6e396f1598f..c82804b1b95 100644 --- a/src/backend/utils/misc/guc.c +++ b/src/backend/utils/misc/guc.c @@ -2265,7 +2265,7 @@ static struct config_int ConfigureNamesInt[] = NULL }, &VacuumCostLimit, - 2000, 1, 10000, + 200, 1, 10000, NULL, NULL, NULL }, diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample index 417f00a8419..6f97a9ae281 100644 --- a/src/backend/utils/misc/postgresql.conf.sample +++ b/src/backend/utils/misc/postgresql.conf.sample @@ -159,7 +159,7 @@ #vacuum_cost_page_hit = 1 # 0-10000 credits #vacuum_cost_page_miss = 10 # 0-10000 credits #vacuum_cost_page_dirty = 20 # 0-10000 credits -#vacuum_cost_limit = 2000 # 1-10000 credits +#vacuum_cost_limit = 200 # 1-10000 credits # - Background Writer - |