Schema Size

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Administrative Snippets

Schema and Database Size

Works with PostgreSQL

Any version

Written in

plpgsql

Depends on

Nothing

Author: Emanuel Calvo


Schema Size

This function provides a simple way to get the size of one schema. Notice that this script doesn't detect if a schema exists or not, in the worst case will return 0.

CREATE OR REPLACE FUNCTION pg_schema_size(pschema text) RETURNS bigint AS $$
DECLARE
  total_size bigint := 0;
  partial_size bigint := 0;
  table_ regclass;
BEGIN
 
  FOR table_ IN SELECT (schemaname || '.' || tablename)::regclass FROM pg_tables WHERE schemaname = pschema
  LOOP
    SELECT pg_relation_size(table_) INTO partial_size;
    total_size := total_size + partial_size;  
  END LOOP; 
 
  RETURN total_size;
END;
$$ LANGUAGE plpgsql;


One way to execute:

general_base=# select pg_size_pretty(pg_schema_size('public'));
-[ RECORD 1 ]--+--------
pg_size_pretty | 4782 MB


Database Size

Sometimes we need to know fast the size of our database, if you are lazy, just compile this function in every database that you have and execute it!

CREATE OR REPLACE FUNCTION sizedb() RETURNS text AS $$
SELECT pg_size_pretty(pg_database_size(current_database()));
$$ LANGUAGE sql;
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