How to check memory used by a process in Linux?

Question

How do I check the memory used by a process at same instance. Input provided is process NAME or ID. Need to know the actual memory used by the process at runtime. What command should I enter to get result.

Answer 1

You have multiple options to find out the actual memory consumption for eg. top (memory/cpu stats), free ( used/unused memory),mpstat ( cpu stats). Although, I'd like to mention the following as it suits your requirement.

top p process_id

Answer 2

试试这个：
ps -e -orss=,args= | sort -b -k1,1n

Answer 3

You can use general and for particular user,

General: top For Particular User: top -U username