PGXC_GET_STAT_ALL_TABLES¶
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.
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.