diff options
| author | Nathan Bossart | 2025-03-20 15:16:50 +0000 |
|---|---|---|
| committer | Nathan Bossart | 2025-03-20 15:16:50 +0000 |
| commit | 0164a0f9ee12e0eff9e4c661358a272ecd65c2d4 (patch) | |
| tree | adc03a29d38053e20cf598d579a8717f16b21212 /src/backend/commands | |
| parent | 618c64ffd3967cb5313b4b11e1e1043a074f2139 (diff) | |
Add vacuum_truncate configuration parameter.
This new parameter works just like the storage parameter of the
same name: if set to true (which is the default), autovacuum and
VACUUM attempt to truncate any empty pages at the end of the table.
It is primarily intended to help users avoid locking issues on hot
standbys. The setting can be overridden with the storage parameter
or VACUUM's TRUNCATE option.
Since there's presently no way to determine whether a Boolean
storage parameter is explicitly set or has just picked up the
default value, this commit also introduces an isset_offset member
to relopt_parse_elt.
Suggested-by: Will Storey <[email protected]>
Author: Nathan Bossart <[email protected]>
Co-authored-by: Gurjeet Singh <[email protected]>
Reviewed-by: Laurenz Albe <[email protected]>
Reviewed-by: Fujii Masao <[email protected]>
Reviewed-by: Robert Treat <[email protected]>
Discussion: https://postgr.es/m/Z2DE4lDX4tHqNGZt%40dev.null
Diffstat (limited to 'src/backend/commands')
| -rw-r--r-- | src/backend/commands/vacuum.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/src/backend/commands/vacuum.c b/src/backend/commands/vacuum.c index e81c9a8aba3..f0a7b87808d 100644 --- a/src/backend/commands/vacuum.c +++ b/src/backend/commands/vacuum.c @@ -78,6 +78,7 @@ int vacuum_failsafe_age; int vacuum_multixact_failsafe_age; double vacuum_max_eager_freeze_failure_rate; bool track_cost_delay_timing; +bool vacuum_truncate; /* * Variables for cost-based vacuum delay. The defaults differ between @@ -2198,13 +2199,21 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params, ((StdRdOptions *) rel->rd_options)->vacuum_max_eager_freeze_failure_rate; /* - * Set truncate option based on truncate reloption if it wasn't specified - * in VACUUM command, or when running in an autovacuum worker + * Set truncate option based on truncate reloption or GUC if it wasn't + * specified in VACUUM command, or when running in an autovacuum worker */ if (params->truncate == VACOPTVALUE_UNSPECIFIED) { - if (rel->rd_options == NULL || - ((StdRdOptions *) rel->rd_options)->vacuum_truncate) + StdRdOptions *opts = (StdRdOptions *) rel->rd_options; + + if (opts && opts->vacuum_truncate_set) + { + if (opts->vacuum_truncate) + params->truncate = VACOPTVALUE_ENABLED; + else + params->truncate = VACOPTVALUE_DISABLED; + } + else if (vacuum_truncate) params->truncate = VACOPTVALUE_ENABLED; else params->truncate = VACOPTVALUE_DISABLED; |