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sqlpostgresqlpostgresql-9.3

postgresql list and order tables by size

How can I list all the tables of a PostgreSQL database and order them by size?

Solution

  • This shows you the size of all tables in the schema public:

    select
  table_name,
  pg_size_pretty(pg_total_relation_size(quote_ident(table_name))),
  pg_total_relation_size(quote_ident(table_name))
from information_schema.tables
where table_schema = 'public'
order by 3 desc;

    If you have multiple schemas, you might want to use:

    select 
  table_schema, 
  table_name,
  pg_relation_size('"'||table_schema||'"."'||table_name||'"')
from information_schema.tables
order by 3

    SQLFiddle example: http://sqlfiddle.com/#!15/13157/3

    List of all object size functions in the manual.