Login to FSx instance using management IP as "fsxadmin"
Enter diagnostic mode **caution while using this mode, should be done with consultation from NetApp Support
In FSx CLI mode >>
set d (yes)
command to check overall latency statistics
qos statistics workload latency show
command to check overall volume statistics
statistics volume show
command to check per volume latency details
qos statistics volume latency show -volume vol01 -vserver svm_name