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| author | Melanie Plageman <melanieplageman@gmail.com> | 2025-03-03 11:18:05 -0500 |
|---|---|---|
| committer | Melanie Plageman <melanieplageman@gmail.com> | 2025-03-03 11:18:05 -0500 |
| commit | 99f8f3fbbc8f743290844e8c676d39dad11c5d5d (patch) | |
| tree | bfa0507e88c83d28053a7e8beb36d8d61b43b871 /src/backend/commands/analyze.c | |
| parent | 8492feb98f6df3f0f03e84ed56f0d1cbb2ac514c (diff) | |
Add relallfrozen to pg_class
Add relallfrozen, an estimate of the number of pages marked all-frozen
in the visibility map.
pg_class already has relallvisible, an estimate of the number of pages
in the relation marked all-visible in the visibility map. This is used
primarily for planning.
relallfrozen, together with relallvisible, is useful for estimating the
outstanding number of all-visible but not all-frozen pages in the
relation for the purposes of scheduling manual VACUUMs and tuning vacuum
freeze parameters.
A future commit will use relallfrozen to trigger more frequent vacuums
on insert-focused workloads with significant volume of frozen data.
Bump catalog version
Author: Melanie Plageman <melanieplageman@gmail.com>
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Reviewed-by: Robert Treat <rob@xzilla.net>
Reviewed-by: Corey Huinker <corey.huinker@gmail.com>
Reviewed-by: Greg Sabino Mullane <htamfids@gmail.com>
Discussion: https://postgr.es/m/flat/CAAKRu_aj-P7YyBz_cPNwztz6ohP%2BvWis%3Diz3YcomkB3NpYA--w%40mail.gmail.com
Diffstat (limited to 'src/backend/commands/analyze.c')
| -rw-r--r-- | src/backend/commands/analyze.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/backend/commands/analyze.c b/src/backend/commands/analyze.c index cd75954951b..2b5fbdcbd82 100644 --- a/src/backend/commands/analyze.c +++ b/src/backend/commands/analyze.c @@ -630,12 +630,11 @@ do_analyze_rel(Relation onerel, VacuumParams *params, */ if (!inh) { - BlockNumber relallvisible; + BlockNumber relallvisible = 0; + BlockNumber relallfrozen = 0; if (RELKIND_HAS_STORAGE(onerel->rd_rel->relkind)) - visibilitymap_count(onerel, &relallvisible, NULL); - else - relallvisible = 0; + visibilitymap_count(onerel, &relallvisible, &relallfrozen); /* * Update pg_class for table relation. CCI first, in case acquirefunc @@ -646,6 +645,7 @@ do_analyze_rel(Relation onerel, VacuumParams *params, relpages, totalrows, relallvisible, + relallfrozen, hasindex, InvalidTransactionId, InvalidMultiXactId, @@ -662,7 +662,7 @@ do_analyze_rel(Relation onerel, VacuumParams *params, vac_update_relstats(Irel[ind], RelationGetNumberOfBlocks(Irel[ind]), totalindexrows, - 0, + 0, 0, false, InvalidTransactionId, InvalidMultiXactId, @@ -678,7 +678,7 @@ do_analyze_rel(Relation onerel, VacuumParams *params, */ CommandCounterIncrement(); vac_update_relstats(onerel, -1, totalrows, - 0, hasindex, InvalidTransactionId, + 0, 0, hasindex, InvalidTransactionId, InvalidMultiXactId, NULL, NULL, in_outer_xact); |