Ubuntu Linux: Process swap memory and memory usage
- by David Halter
My Ubuntu eats more memory than the task manager is showing:
sudo ps -e --format rss | awk 'BEGIN{c=0} {c+=$1} END{print c/1024}'
1043.84
free -m
total used free shared buffers cached
Mem: 3860 1878 1982 0 20 679
-/+ buffers/cache: 1178 2681
Swap: 2729 1035 1693
That's strange. Can someone explain this difference?
But what is more important:
I'd like to know how much memory a process is really using. I don't want to know the virtual memory size, but rather the resident memory plus swap of a process.
I have also tried to output the format param "sz" of 'ps', but the sum of this is to high (5450 MB) (param 'size' gives 8323.45 MB). Are there any other options?
I really want to use this, to determine which programs/processes are eating to much memory (and swap), to kill them, because hibernate might not be working if the swap partition is to little.
