Re: Table-space documentation

On Sun, 2023-11-26 at 21:41 +0000, PG Doc comments form wrote:
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/16/manage-ag-tablespaces.html
> Description:
>
> While reading the table-space documentation
> https://www.postgresql.org/docs/16/manage-ag-tablespaces.html the
> information I was looking for was not included. The page invites feedback,
> so I though I would share. I was specifically looking for information on
> maximum table-space size and whether there is a use-case in which you would
> create several table-spaces to split your tables / indexes logically. I am
> from an Oracle world and it is normal for me to think about creating
> multiple table-spaces for groups of tables and placing a size on the
> table-space so that space does not extend and fill the o/s disk-space. It
> would be nice for the documentation to include information about this topic.
> Even if it is says that these factors I should not worry about as postgres
> handles them.

There is no maximum tablespace size, other than the size of the filesystem
the tablespace is on.

In 99% of all cases, don't create a tablespace in PostgreSQL. Just use
the default tablespace.

In a virtualized environment, don't ever create a tablespace.

Tablespaces were more important back what people had physical boxes
with physical disks of limited size.

There are still some use cases, but they are extremely rare.

Yours,
Laurenz Albe