Updated on 2024-06-03 GMT+08:00

SUMMARY_STAT_SYS_TABLES

Displays the sum of the status information in all system catalogs on each node in pg_catalog, information_schema, and pg_toast schemas. The status information in the system catalogs on each node is summed up, as described in Table 1. Columns of the timestamp type are not summed up, and only the latest values of these columns on all nodes are used.

Table 1 SUMMARY_STAT_SYS_TABLES columns

Name

Type

Description

schemaname

name

Name of the schema where the table is located.

relname

name

Table name.

seq_scan

numeric

Number of sequential scans initiated on this table.

seq_tup_read

numeric

Number of live rows fetched by sequential scans.

idx_scan

numeric

Number of index scans initiated on the table.

idx_tup_fetch

numeric

Number of live rows fetched by index scans.

n_tup_ins

numeric

Number of rows inserted.

n_tup_upd

numeric

Number of rows updated.

n_tup_del

numeric

Number of rows deleted.

n_tup_hot_upd

numeric

Number of rows updated by HOT (that is, the number of rows whose index columns are not updated).

n_live_tup

numeric

Estimated number of live rows.

n_dead_tup

numeric

Estimated number of inactive rows.

last_vacuum

timestamp with time zone

Last time at which this table was manually vacuumed (not counting VACUUM FULL).

last_autovacuum

timestamp with time zone

Last time when the table was vacuumed by the autovacuum daemon thread.

last_analyze

timestamp with time zone

Last time when the table was manually analyzed.

last_autoanalyze

timestamp with time zone

Last time when the table was analyzed by the autovacuum daemon thread.

vacuum_count

numeric

Number of times that the table has been manually vacuumed (not counting VACUUM FULL).

autovacuum_count

numeric

Number of times that the table has been vacuumed by the autovacuum daemon.

analyze_count

numeric

Number of times that the table has been manually analyzed.

autoanalyze_count

numeric

Number of times that the table has been analyzed by the autovacuum daemon thread.