How to tell if you are Disk IO bound

MySQL & MariaDB Other MySQL® Questions
1

I assume that the way you tell if your MYSQL server is CPU bound is by watching the cpu usage percentage in top or ps…but how do I tell if its Disk IO bound?

2

I normally check iostat -x and see % busy for disks.

If load is IO bound one of more of them will be close to 100%

You can also check iowait column in vmstat it shows time spent waited on IO