Get The Size Of A Table

In Get The Size Of A Database, I showed a PostgreSQL administrative function, pg_database_size(), that gets the size of a given database. With the pg_relation_size() function, we can get the size of a given table. For instance, if we'd like to see the size of the reservations table, we can executing the following query:

> select pg_relation_size('reservations');
 pg_relation_size
------------------
          1531904

This gives us the size of the reservations table in bytes. As you might expect, the referenced table needs to be part of the connected database and on the search path.

See the Postgres docs for more details.