How to identify the critical load on the disk subsystem?

Question

linux

Hello! The host sent me an email with the following content:

Your VPS created a critical load on the disk subsystem of the physical server

As a result, I cut off all ports to it except 22. Tell me how to see what exactly created this critical load?

Answer 1

Well, how do you look right now, if after cutting off the load has already stopped?
In general, the iotop utility perfectly shows the load on disks.
You can also htop - it is more universal, displaying the I / O speed of processes can be easily added there in the settings.