Well KDE had this awesome process management tool, I think it was called System Monitor or something. You could tune process priorities with IO and CPU. They deprecated the tool though, I think because nobody wanted to port it to QT6
EDIT: It’s not System Monitor. I can’t recall the name, but there used to be an app that let you set niceness / priorities of your processes.
You’re right. I can’t recall the other utility’s name. System Monitor is fantastic, but I just wish I could set the niceness and all that like you could on the old utility.