text: /* The size of indexes, descending by size */
  
  SELECT c.relname AS name,
    pg_size_pretty(sum(c.relpages::bigint*8192)::bigint) AS size
  FROM pg_class c
  LEFT JOIN pg_namespace n ON (n.oid = c.relnamespace)
  WHERE n.nspname NOT IN ('pg_catalog', 'information_schema')
  AND n.nspname !~ '^pg_toast'
  AND c.relkind='i'
  GROUP BY c.relname
  ORDER BY sum(c.relpages) DESC;
  