pavan95 wrote:
> In postgres for knowing the size of a database we generally use the system
> administration function "pg_database_size('database_name')".
>
> I am curious to know how does this calculate internally from the pages(free
> pages/fragmented pages/full pages) stored in the disk?
It just adds up the sizes of the files that make up the database.
Yours,
Laurenz Albe
