diff options
| author | Melanie Plageman | 2025-03-03 16:18:05 +0000 |
|---|---|---|
| committer | Melanie Plageman | 2025-03-03 16:18:05 +0000 |
| commit | 99f8f3fbbc8f743290844e8c676d39dad11c5d5d (patch) | |
| tree | bfa0507e88c83d28053a7e8beb36d8d61b43b871 /src/include | |
| 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/include')
| -rw-r--r-- | src/include/catalog/catversion.h | 2 | ||||
| -rw-r--r-- | src/include/catalog/pg_class.h | 3 | ||||
| -rw-r--r-- | src/include/commands/vacuum.h | 1 |
3 files changed, 5 insertions, 1 deletions
diff --git a/src/include/catalog/catversion.h b/src/include/catalog/catversion.h index 12163ae94be..f0962e17b33 100644 --- a/src/include/catalog/catversion.h +++ b/src/include/catalog/catversion.h @@ -57,6 +57,6 @@ */ /* yyyymmddN */ -#define CATALOG_VERSION_NO 202502242 +#define CATALOG_VERSION_NO 202503031 #endif diff --git a/src/include/catalog/pg_class.h b/src/include/catalog/pg_class.h index f0d612ca487..fa96ba07bf4 100644 --- a/src/include/catalog/pg_class.h +++ b/src/include/catalog/pg_class.h @@ -68,6 +68,9 @@ CATALOG(pg_class,1259,RelationRelationId) BKI_BOOTSTRAP BKI_ROWTYPE_OID(83,Relat /* # of all-visible blocks (not always up-to-date) */ int32 relallvisible BKI_DEFAULT(0); + /* # of all-frozen blocks (not always up-to-date) */ + int32 relallfrozen BKI_DEFAULT(0); + /* OID of toast table; 0 if none */ Oid reltoastrelid BKI_DEFAULT(0) BKI_LOOKUP_OPT(pg_class); diff --git a/src/include/commands/vacuum.h b/src/include/commands/vacuum.h index 1571a66c6bf..baacc63f590 100644 --- a/src/include/commands/vacuum.h +++ b/src/include/commands/vacuum.h @@ -349,6 +349,7 @@ extern void vac_update_relstats(Relation relation, BlockNumber num_pages, double num_tuples, BlockNumber num_all_visible_pages, + BlockNumber num_all_frozen_pages, bool hasindex, TransactionId frozenxid, MultiXactId minmulti, |