I made lengthy practice on dstat. And yet I failed this practice question again today.
"The linux dstat command helps you make sure your linux cluster is not paging"
The correct answer is: TRUE. How can that be? I would say FALSE would be a more appropriate answer.
dstat displays information. It is not designed to stop paging activity.
dstat is not cluster aware. And how would it care you have a Cassandra cluster? You run
dstat on a NODE. And somehow you expect it to stop paging on the CLUSTER ?!?!