4
votes
1answer
1k views

If “top” indicates CPU is spending 10% on %wa (iowait), does that mean the CPU is idle?

I am referring to the Linux top command. If it indicates 10.4% was spent on wa, does that mean 10.4% CPU was available for other processes? top - 09:40:45 up 178 days, 34 min, 1 user, load ...
6
votes
1answer
12k views

top says IOWAIT is high, how to I find the culprit processes

I know I should not do it but I run some Ubuntu system from an USB flash drive, in persistent mode, and it is painfully slow. "top" tells me it is not because of CPU, it is because of IO, ie high ...