Re: SELECT Query taking 200 ms on PostgreSQL compared to 4 ms on Oracle after migration.

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Bruce Momjian <bruce@xxxxxxxxxx> 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






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