Tasks on Nodejs server

I'm using Nodejs for my server and I am hosting my application on Heroku. I am also using Redis to lock tasks on my server to avoid same concurrent tasks on same time on my server. We were wondering about using Load Balancer to balance between the tasks on our server. 1. Is this a good option to balance our tasks? 2. How can we check if the server is busy ? 3. How can we check if the server is busy and if its busy to open a new Port and run a new task?

Thank you.

via drorAlfasi