Heroku - error KnexTimeoutError: Knex: Timeout acquiring a connection. The pool is probably full. Are you missing a .transacting(trx) call?

[mingxi]

@DMehaffy Thank you for the fast answer!
By the way, I have the database Heroku Postgres (Hobby Basic).

Heroku Postgres - Add-ons - Heroku Elements

Should I rather upgrade my Strap dyno Type or my database, or both?
Many thanks!