From MSA information I see Controller firmware need to update to GL225R003. Please follow this link,
www.hpe.com/storage/MSAFirmware
Drive firmware need to update for Drive model: EG0900JETKB. Please follow the link,
I checked statistics output but they looks fine to me. There is no CPU load or any high latency seen at the time of capture of outputs.
Anyway they are just captured once. First update MSA firmware for all components, update Server all components driver/firmware. Then reboot both MSA and Server. After that check if you face any performance. That time you need to capture following output at least 10 to 15 times by giving 2 minutes gap,
# show controller-statistics
# show disk-statistics
# show host-port-statistics
# show vdisk-statistics
# show volume-statistics
Note: Before you work on any performance issue thumb rule is you need to make sure your hardware is error free and all are up to date with driver/firmware