depends on your hash, and network weight
https://docs.google.com/spreadsheets/d/1hsCAsj2NCCNfKFo0byIJ8V2owbbqM6DZYahv4ucZ_XY/edit#gid=0
look here for more info

anyway your hash is too low
what is your setgenerate true x ? line
X being a number representing the amount of participating logical cores (min 1 max -1)

eg if you have 4 cores CPU try setgenerate true 4
or
setgenerate true 8

then check if your CPU is 100% load