This module contains two functions that report the size of a given
database or relation. E.g.,
SELECT database_size('template1');
SELECT relation_size('pg_class');
These functions report the actual file system space. Thus, users can
avoid digging through the details of the database directories.
Copy this directory to contrib/dbsize in your PostgreSQL source tree.
Then just run make; make install. Finally, load the functions into any
database using dbsize.sql.
When computing the size of a table, it does not include TOAST or index
disk space.
