thank you. I know I am not using recommended hardware. However I have not had any issues for the 3 or 4 years that I been using Freenas. This issue is new and it only happens from time to time.
I learned that if only one client is attached to FreeNas, all is ok. As soon as a second client is attached the Interrupt cpu usage goes higher. I have attached screen shots of "top -mio" for normal and high cpu usage. Can anybody suggest why this is happening?