How can I set the max number of MySQL processes or threads?

Question

ps axuw| grep mysql indicates only MySQL process, but if I run htop I can see 10 rows each one of them with a separate PID. So I wonder if they are threads or proce

Answer 1

MySQL does use threads, ps can see them if you run ps -eLf.

That said, I wouldn't worry about it - dormant threads use almost no resources whatsoever, and if you constrain the server too much it's bound to come back and bite you on the backside sometime later when you've forgotten that you did it.