Re: Temporary tablespaces on a RAM disk

On 3/17/20 12:19 PM, David G. Johnston wrote:
> On Tue, Mar 17, 2020 at 2:49 AM Daniel Westermann (DWE)
> <daniel(dot)westermann(at)dbi-services(dot)com
> <mailto:daniel(dot)westermann(at)dbi-services(dot)com>> wrote:
>
> is someone using temporary tablespaces on a RAM disk ? Any experiences
> with that?
> I did some quick tests and checked the archives but could not find any
> information that either confirmed it is a bad idea nor the opposite.
>
>
> There is a nice big bold warning callout in the documentation that covers
> this explicitly.
>
> https://www.postgresql.org/docs/12/manage-ag-tablespaces.html

Warning
Placing a tablespace on a temporary file system like a RAM disk risks the
reliability of the entire cluster.

But aren't temporary files removed when you restart Postgres?  (I'm assuming
that temp_tablespaces is treated "the same" as data/pgsql_tmp.  Is that a
false assumption?)

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