Generic extremely low cost query - Running long

Hi Guys, Sorry for the bold below. I just feel it helps me identify my
question easily.

A description of what you are trying to achieve and what results you
expect.:

*A very low cost query running long (clustered and vacuumed and analyzed on
join columns), a very generic query..What can be done without admin privs??*

PostgreSQL version number you are running: *11.5*

How you installed PostgreSQL: *admin installed it*

Changes made to the settings in the postgresql.conf file: see Server
Configuration for a quick way to list them all. *no changes to
postgresql.conf*

Operating system and version:

What program you're using to connect to PostgreSQL: *pgadmin 4v4*

Is there anything relevant or unusual in the PostgreSQL server logs?: *no*

For questions about any kind of error: *no errors*

What you were doing when the error happened / how to cause the error: *no
error*

The EXACT TEXT of the error message you're getting, if there is one: (Copy
and paste the message to the email, do not send a screenshot) *no error.*

--
Thanks & Regards
Koteswara Daliparthi