How to get memory "used" by a process in Linux?

Question

My program wants to detect how much memory it's using & issue a warning if it goes larger than a threshold. I don't care about memory that has been allocated but never accessed, since that's not backed by either RAM or swap. How do I get the total RAM + swap used by my process? Does "resident set size" include swap?

Edit: As others have pointed out, getting the resident size is easy, but doesn't include swap. So this question is really about how to get the amount of swap used by a process.

there is a [good question](http://stackoverflow.com/questions/131303/linux-how-to-measure-actual-memory-usage-of-an-application-or-process?rq=1) about that — fotanus, May 23 '13 at 19:55
Use the [proc(5)](http://man7.org/linux/man-pages/man5/proc.5.html) filesystem, notably `/proc/self/stat` — Basile Starynkevitch, May 23 '13 at 20:08
That question doesn't provide swap, and from man 5 stat, nswap and cnswap fields are not maintained. Any other ideas about where to get the swap? — Martin C. Martin, May 23 '13 at 21:22

score -1 · Answer 1 · edited May 23 '17 at 12:28

-1

There's already a thread about this: How to get memory usage at run time in c++?

See this page: How to get the resident set size

RSS is the RAM portion, excluding the swap and unloaded.

edited May 23 '17 at 12:28

Community

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answered May 23 '13 at 19:57

gongzhitaao

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Thanks, those answer half the question, namely where to get RSS. They don't tell me how to get swap. – Martin C. Martin May 23 '13 at 21:23
@Downvoter why downvote? – gongzhitaao May 23 '13 at 22:33
@MartinC.Martin Yep. I only know how to get RSS :P – gongzhitaao May 23 '13 at 22:35

How to get memory "used" by a process in Linux?

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