Re: SELECT Query taking 200 ms on PostgreSQL compared to 4 ms on Oracle after migration. - Mailing list pgsql-performance

Bruce Momjian <bruce@momjian.us> writes:
> On Sat, Apr  3, 2021 at 08:38:18PM +0530, aditya desai wrote:
>> Yes, force_parallel_mode is on. Should we set it off?

> Yes.  I bet someone set it without reading our docs:

>     https://www.postgresql.org/docs/13/runtime-config-query.html#RUNTIME-CONFIG-QUERY-OTHER

> -->    Allows the use of parallel queries for testing purposes even in cases
> -->    where no performance benefit is expected.

> We might need to clarify this sentence to be clearer it is _only_ for
> testing.

I wonder why it is listed under planner options at all, and not under
developer options.

            regards, tom lane