QOS INF is always useful...a lot of what you are looking for... examples below.
::> qos policy-group create -policy-group unlimited -vserver vsname -max-throughput INF
::> qos policy-group show
::> vol modify * -qos-policy-group unlimited # don't set for vsroot
# "none" to set back to no value
::> qos statistics workload performance show -refresh-display true
::> qos statistics performance show
::> qos statistics characteristics show
::> qos statistics latency show
::> qos statistics volume show
::> qos statistics volume characteristics show
::> qos statistics workload characteristics show
::> qos statistics resource cpu show -node nodename
::> qos statistics volume latency show
::> qos statistics volume performance show
::> qos statistics workload resource cpu show -node nodename
::> qos statistics workload resource disk show -node nodename
::> qos statistics volume resource cpu show -nodename
::> qos statistics volume resource disk show -nodename
::> set adv
::*> statistics show-periodic
::*> statistics show-periodic -object node -instance node -node nodename