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Add stats_reset to pg_stat_all_{tables,indexes} and related views

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It is possible to call pg_stat_reset_single_table_counters() on a
relation (index or table) but the reset time was missing from the system
views showing their statistics.

This commit adds the reset time as an attribute of pg_stat_all_tables,
pg_stat_all_indexes, and other relations related to them.

Bump catalog version.
Bump PGSTAT_FILE_FORMAT_ID, as a result of the new field added to
PgStat_StatTabEntry.

Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Reviewed-by: Sami Imseih <samimseih@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/aN8l182jKxEq1h9f@paquier.xyz
This commit is contained in:
Michael Paquier
2025-10-06 15:31:21 +09:00
parent c173aaff98
commit a5b543258a
12 changed files with 117 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
src/backend/catalog/system_views.sql
View File

@@ -716,7 +716,8 @@ CREATE VIEW pg_stat_all_tables AS
pg_stat_get_total_vacuum_time(C.oid) AS total_vacuum_time,
pg_stat_get_total_autovacuum_time(C.oid) AS total_autovacuum_time,
pg_stat_get_total_analyze_time(C.oid) AS total_analyze_time,
pg_stat_get_total_autoanalyze_time(C.oid) AS total_autoanalyze_time
pg_stat_get_total_autoanalyze_time(C.oid) AS total_autoanalyze_time,
pg_stat_get_stat_reset_time(C.oid) AS stats_reset
FROM pg_class C LEFT JOIN
pg_index I ON C.oid = I.indrelid
LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace)
@@ -778,7 +779,8 @@ CREATE VIEW pg_statio_all_tables AS
pg_stat_get_blocks_hit(T.oid) AS toast_blks_read,
pg_stat_get_blocks_hit(T.oid) AS toast_blks_hit,
X.idx_blks_read AS tidx_blks_read,
X.idx_blks_hit AS tidx_blks_hit
X.idx_blks_hit AS tidx_blks_hit,
pg_stat_get_stat_reset_time(C.oid) AS stats_reset
FROM pg_class C LEFT JOIN
pg_class T ON C.reltoastrelid = T.oid
LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace)
@@ -818,7 +820,8 @@ CREATE VIEW pg_stat_all_indexes AS
pg_stat_get_numscans(I.oid) AS idx_scan,
pg_stat_get_lastscan(I.oid) AS last_idx_scan,
pg_stat_get_tuples_returned(I.oid) AS idx_tup_read,
pg_stat_get_tuples_fetched(I.oid) AS idx_tup_fetch
pg_stat_get_tuples_fetched(I.oid) AS idx_tup_fetch,
pg_stat_get_stat_reset_time(I.oid) AS stats_reset
FROM pg_class C JOIN
pg_index X ON C.oid = X.indrelid JOIN
pg_class I ON I.oid = X.indexrelid
@@ -844,7 +847,8 @@ CREATE VIEW pg_statio_all_indexes AS
I.relname AS indexrelname,
pg_stat_get_blocks_fetched(I.oid) -
pg_stat_get_blocks_hit(I.oid) AS idx_blks_read,
pg_stat_get_blocks_hit(I.oid) AS idx_blks_hit
pg_stat_get_blocks_hit(I.oid) AS idx_blks_hit,
pg_stat_get_stat_reset_time(I.oid) AS stats_reset
FROM pg_class C JOIN
pg_index X ON C.oid = X.indrelid JOIN
pg_class I ON I.oid = X.indexrelid

1
src/backend/utils/activity/pgstat.c
View File

@@ -313,6 +313,7 @@ static const PgStat_KindInfo pgstat_kind_builtin_infos[PGSTAT_KIND_BUILTIN_SIZE]
.flush_pending_cb = pgstat_relation_flush_cb,
.delete_pending_cb = pgstat_relation_delete_pending_cb,
.reset_timestamp_cb = pgstat_relation_reset_timestamp_cb,
},
[PGSTAT_KIND_FUNCTION] = {

6
src/backend/utils/activity/pgstat_relation.c
View File

@@ -910,6 +910,12 @@ pgstat_relation_delete_pending_cb(PgStat_EntryRef *entry_ref)
pgstat_unlink_relation(pending->relation);
}
void
pgstat_relation_reset_timestamp_cb(PgStatShared_Common *header, TimestampTz ts)
{
((PgStatShared_Relation *) header)->stats.stat_reset_time = ts;
}
/*
* Find or create a PgStat_TableStatus entry for rel. New entry is created and
* initialized if not exists.

3
src/backend/utils/adt/pgstatfuncs.c
View File

@@ -168,6 +168,9 @@ PG_STAT_GET_RELENTRY_TIMESTAMPTZ(last_vacuum_time)
/* pg_stat_get_lastscan */
PG_STAT_GET_RELENTRY_TIMESTAMPTZ(lastscan)
/* pg_stat_get_stat_reset_time */
PG_STAT_GET_RELENTRY_TIMESTAMPTZ(stat_reset_time)
Datum
pg_stat_get_function_calls(PG_FUNCTION_ARGS)
{