What type of table should I choose for 200-400 concurrent connections?

Question

JavaScript

I'm trying to figure out what type of table to choose for such conditions:

1. 200-400 persistent connections with every second bombing 3 requests
   
2. Only 4 tables: data is constantly read from one (it is updated separately), and in the remaining 3, the keys are updated (in fact, each connection has its own separate row without massive data a la application status, etc.)
   

Questions:

1. What type of tables to choose?
   
2. How time consuming task is this for mysql?
   
3. What else is worth knowing so that mysql does not collapse?
   

I look towards Innodb. I know little about mysql

Answer 1

And is it set up correctly?
This is how it works for me

Answer 2

You wrote a bit of nonsense, but after your question on SSL, you are forgiven ))
Why keep them open? Open connections every 3 requests. If for writing, then I recorded 1200 requests per second without any tuning, if for reading, then even more.
Increase simply the number of concurrent connections available in my.cnf