Our server started getting slow, so I ran iostat on it.
iostat -dx 5
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sda 0.00 89.60 108.40 5.60 880.00 763.20 14.41 2.61 22.87 8.70 99.20
sdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
So I see that the one disk sda is totally saturated. How do I find which exact processes are causing this? (or is it swapping to that disk?)