On Wed, Sep 5, 2018 at 4:43 AM, PG Doc comments form <noreply(at)postgresql(dot)org
> wrote:
> I'm wondering if the two statements given showing the index space size as
> described.
> I've the impression they show the space size of the tables.
>
"Each page is typically 8 kilobytes. (Remember, relpages is only updated by
VACUUM, ANALYZE, and a few DDL commands such as CREATE INDEX.)"
So while it takes a bit of interpretation it is stated that "relpages" are
not a size on their own but a value to be multiplied by 8k to come up with
the disk size (typically since one can compile the server with a different
page size).
David J.