ps (Memory)

To display processes in order of real memory (RSS) use

$ ps avx | head -1 ; ps avx | grep -v PID | sort -rn +6 | head -10

The RSS value is the size of working segment and code segment combined together in memory in 1 KB units.

To display top 10 Memory Consuming Process (SZ)

$ ps -ealf | head -1 ; ps -ealf | sort -rn +9 | head -10

or

$ ps aux | head -1; ps aux | sort -rn +4 | head -10

The SZ represents the virtual size in kilobytes of the data section of the process. This number is equal to the number of working-segment pages of the process that have been touched (that is, the number of paging-space slots that have been allocated)times four. File pages are excluded. If some working-segment pages are currently paged out, this number is larger than the amount of real memory being used.


To display top 10 Memory Consuming Process (%MEM)

$ ps aux | head -1 ; ps aux | sort -rn +3 | head -10

Thanks