I am stuck in a situation where MySQL greatly slows down the server.
Mysqltuner utility Recommendations only aggravate the situation. The author of the script and I do not change anything in it. I read somewhere that if two users are working with the database, it turns out much better than one? Is it true?
Welcome to Iw forums
In order to try and help you on the forums, we need more information
What distro, Iw-cp and MySQL are you using
Is it vps or dedicated and what are the server specs, cpu, ram hard drives etc
Have you checked top to see what resources are been used
Have you checked MySQL stats
If recently upgraded MySQL, have you run the update schema from ssh
Are there any errors in MySQL log
These answers would help forum users understand your setup better and offer their thoughts