PGXC_GET_STAT_ALL_TABLES displays information about insertion, update, and deletion operations on tables and the dirty page rate of tables.

Before running VACUUM FULL to a system catalog with a high dirty page rate, ensure that no user is performing operations it.

You are advised to run VACUUM FULL to tables (excluding system catalogs) whose dirty page rate exceeds 30% or run it based on service scenarios.

**Table 1** PGXC_GET_STAT_ALL_TABLES columns
Name	Type	Description
relid	oid	Table OID
relname	name	Table name
schemaname	name	Schema name of the table
n_tup_ins	numeric	Number of inserted tuples
n_tup_upd	numeric	Number of updated tuples
n_tup_del	numeric	Number of deleted tuples
n_live_tup	numeric	Number of live tuples
n_dead_tup	numeric	Number of dead tuples
page_dirty_rate	numeric(5,2)	Dirty page rate (%) of a table

GaussDB(DWS) also provides the pgxc_get_stat_dirty_tables(int dirty_percent, int n_tuples) and pgxc_get_stat_dirty_tables(int dirty_percent, int n_tuples, text schema) functions to quickly filter out tables whose dirty page rate is greater than dirty_percent, number of dead tuples is greater than n_tuples, and schema name is schema. For details, see "Functions and Operators > System Administration Functions > Other Functions" in the SQL Syntax.