What is the recommendation for the Mysql Connection Pool in Nodejs?

Question

According to the documentation of mysql for Nodejs, it is possible to configure a connection pool to limit the number of connections in Mysql

When running the following command on my Mysql server:

  show variables like 'max_connections';

I got the following result

Variable_name    |  Value
 max_connection  |  151

Knowing that in Nodejs I can configure the pool as follows:

var mysql = require('mysql');
var pool  = mysql.createPool({
  connectionLimit : 10,
  host            : 'example.org',
  user            : 'bob',
  password        : 'secret',
  database        : 'my_db'
});

In that attribute connectionLimit : 10, which is recommended to use?

The limit which is 151 or less?

Or I can increase in mysql?

Or how much I can raise?

Thank you for the clarification