Look, whenever I answer this question it always stress test and find out.
This forum is for technical questions, if you want help optimizing your application
hire a consultant if you can't do it yourself.
I always have to go into long discussions because people who ask this question
don't know the difference between a pool and a cache or their relative importance.
There are also more important configurations like front end threads, db pool
and OS configuration.
If you are interested, use search, you might enjoy some of this misunderstandings
people have. :-)