Following command can tell memory usage by individual process in linux.
root# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 2020 636 ? Ss Jan 21 0.02 init[5]
In the above given output VSZ stands for Virtual Set Size and RSS stands for Resident Set Size. These two VSZ and RSS tell how much memory process are taking up.
But output by ps is not really correct. The reason is very simple, as we know running process use many loaded shared libraries. ps command also include space used by those libraries, but the fact is that same libraries can be used by many processes. To know memory map of loaded shared libaries used by a particular process we can use pmap command.
root# pmap 2939
(Here 2939 is process id)
root# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 2020 636 ? Ss Jan 21 0.02 init[5]
In the above given output VSZ stands for Virtual Set Size and RSS stands for Resident Set Size. These two VSZ and RSS tell how much memory process are taking up.
But output by ps is not really correct. The reason is very simple, as we know running process use many loaded shared libraries. ps command also include space used by those libraries, but the fact is that same libraries can be used by many processes. To know memory map of loaded shared libaries used by a particular process we can use pmap command.
root# pmap 2939
(Here 2939 is process id)
