Thank you Tim,
This is output of Free -m
total used free shared buffers cached
Mem: 3948 3240 708 0 269 803
-/+ buffers/cache: 2166 1782
Swap: 10268 0 10267
and I notice there is bit difference between used memory in "free -m" and Actual Real memory in "cpstat -f memory os"
cpstat -f memory os
Total Virtual Memory (Bytes): 14907256832
Active Virtual Memory (Bytes): 2276896768
Total Real Memory (Bytes): 4140376064
Active Real Memory (Bytes): 2276290560
Free Real Memory (Bytes): 1864085504
Memory Swaps/Sec: -
Memory To Disk Transfers/Sec: -
So what should worry more free -m output or cpstat -f memory os ?