My db is giving a “too many connections” error so I need to increase the max number of connections. What (and what path) is the file that I need to modify?

I have searched the topics and submitted a support ticket… but nothing.

This is an excerpt of my error log:
2019/12/13 20:13:02 [error] [exception.CDbException] SQLSTATE[HY000] [2006] MySQL server has gone away
2019/12/13 20:13:02 [error] [application] CDbConnection failed to open the DB connection.
2019/12/13 20:13:02 [error] [exception.CDbException] SQLSTATE[HY000] [1040] Too many connections

Thank you!