how to get the physical memory used by a couple of processes?

I am doing a test to get the memory used by apache`s apache2 processes. I used a script to get VmSize and VmRss from /proc/pid/status, and loop through that to get the sum of VmSize and VmRss of all the apache2 processes.

I found the VmSize (about 4GB) and VmRss (about 3.4GB) are much larger than the physical memory (1GB) when apache server was saturated. It was said because of the multi-counted libiraries size used by many processes simultaneously.

Then , how to get the physical memory used by apache2 processes? Or how to get a more reasonable memory data?

Hi koshihaku,

As i know you are not able to find physical memory used by process you get overall used memory of process.

take a look here it might help you

http://www.linuxquestions.org/questi...y-swap-663109/

Originally Posted by sem007 Hi koshihaku, As i know you are not able to find physical memory used by process you get overall used memory of process. take a look here it might help you http://www.linuxquestions.org/questi...y-swap-663109/

Thank you very much!

It was said that there are large scale of virtual memory occupied by some shared libraries. So the VmSize is much larger than the physical memory.

I have got a program written by someone which can get the phisical memory used by a program with some processes.

Originally Posted by koshihaku I have got a program written by someone which can get the phisical memory used by a program with some processes.

Great!!
I would like to test that one if you share name or link of that program.

Regards,

Originally Posted by sem007 Great!! I would like to test that one if you share name or link of that program. Regards,

http://www.pixelbeat.org/scripts/ps_mem.py

This is the python script. I have no knowledge of python. I embeded it in a very simple shell script to run it every 30 seconds. I think it is ok .


Is it possible to re-write it in shell?

Originally Posted by sem007 Great!! I would like to test that one if you share name or link of that program. Regards,

How do you find the script? Does it work well?

Originally Posted by koshihaku How do you find the script? Does it work well?

Hi koshihaku,

I'm in the middle of a one important task and i did not test that script yet. so little patience i will test it as soon as possible and give comment.

Regards,

Originally Posted by sem007 Hi koshihaku, I'm in the middle of a one important task and i did not test that script yet. so little patience i will test it as soon as possible and give comment. Regards,

thanks a lot!