UNIX for Advanced & Expert Users

Hello,
I'm working with Linux 2.4.18
I'll like to know, if there is a way to know exactly what is using the RAM memory of my box.
I try with ps command, but the size of the memory usage than I can calculate, it is very diferent compared with the information that I get with the free command.

There is an aplication, or a way to examine in detail the RAM usage??

Thanks in advace.
Regards!

Perhaps examining the size column of the output of the top command is what you are looking for?

you can also try vmstat

The linux version of vmstat only provides summary information:

Code:

   Swap
www# vmstat    
   procs                      memory    swap          io     system         cpu
 r  b  w   swpd   free   buff  cache  si  so    bi    bo   in    cs  us  sy  id
 0  0  0   1452  79228 282476  68832   0   0     0     2    2     2   1   1   1

I think the poster was looking for detailed process-by-process RAM usage information, as I understood the post.

I try it to, but the result it's the same that ps.

Yes, that is what I'm looking for.
I'm sorry if the sintax of the post looks a litle weird, my english is not very good

Thanks again!|

You may have to look closer at the ps command for process by process information (realize that this still does not give you anything but a snapshot of what is going on when you run it - building a script to collect the information might help.).

Determine process memory usage (Note 'accepted answer')

Another thing to note - you run the ps command and do your calculation. That uses memory, cpu. You run the free command and that uses cpu, memory...if you are on a single cpu server, there is no way you can run both commands at exactly the same time. Other processes will finish and give back memory, some will start up and eat up more. You need to understand that you would never get A=B.