Originally posted by: SzymonMiotk

Hello,

I'm investigating memory usage on one AIX 5.3 server and I'm a bit
puzzled.
The server has 16GB and svmon shows the following usage:
bw_test@dtibbw01 /usr/local/stat/2011/07 $ svmon -G
size inuse free pin virtual
memory 4046848 3614960 431888 759611 4513329
pg space 2588672 1563676

work pers clnt other
pin 622641 0 0 136970
in use 3516509 0 98451

So the 14GB are "inuse".
So I want to find which processes are using the memory.
I do
svmon -Pn | egrep "Y|N" #egrep to print the summary line only

The sum of all "inuse" is 1992673 - 7.7GB

Where is the missing 6.3GB memory? It's not gone for caching because topas reports:
% Comp 89
% Noncomp 7
% Client 7

Thank you in advance,
Szymon Miotk
#AIX-Forum

Originally posted by: Pranab

Hi, Have you got an answer to this by now? Actually, I am also facing the same problem while analyzing memory usage on an aix5.3 box. We have some instances on db29.1 and some on db2 9.7. How do we find out the "Total memory used by all processes (related to all instances of db2) on the system"? Please share if you have an idea how to diagnose this.

Thanks,
Pranab
#AIX-Forum

Originally posted by: MarkTaylor

shared memory segments in one word .. ok, thats 3 words .. ipcs -ma .. you may want to have a google for this, there are plenty of docs out there that give you layman's break down of AIX VMM and memory model ..

HTH
Mark Taylor
#AIX-Forum