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

koshihaku · 09-03-2010, 12:36 AM

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?

sem007 · 09-04-2010, 12:15 AM

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/

koshihaku · 09-04-2010, 12:37 AM

Quote:

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.

sem007 · 09-04-2010, 12:40 AM

Quote:

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,

koshihaku · 09-04-2010, 12:44 AM

Quote:

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?

koshihaku · 09-16-2010, 08:09 PM

Quote:

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?

sem007 · 09-17-2010, 01:44 AM

Quote:

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,

koshihaku · 09-19-2010, 10:03 PM

Quote:

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!