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First find out which nodes your running job is using
qstat -awu <userid> -n1
Or if your job has many nodes then this is more legible.
qstat -awu <userid> -n
Thereafter login (ssh) to the 1st node, and then at least 1 or 2 other nodes (if not an smp single node job of course). On each node run the command “htop” (or “top”).