topic Re: Memory usage GlancePlus versus ps in Operating System - HP-UX

Memory usage GlancePlus versus ps

Gordon_10 — Fri, 19 Mar 2004 10:22:16 GMT

Why does the memory usage of an application group in GlancePlus not equal the amount of memory shown in the size portion of a ps command? I would expect some variance but the numbers are off by mega bytes.

Re: Memory usage GlancePlus versus ps

G. Vrijhoeven — Fri, 19 Mar 2004 10:26:59 GMT

Gordon,

What kind of memory useage are you compairing? Note that memory usage reports are estimates and they "can" differ in time.

Gideon

Re: Memory usage GlancePlus versus ps

Geoff Wild — Fri, 19 Mar 2004 10:30:39 GMT

How are you getting the memory with ps?

I do it like:

#!/bin/ksh
# usermem - display memory claimed by a user
#
if [ $# -lt 1 -o $ $# -gt 1 -a $# -lt 4 $ ]
then
echo "Usage:"
echo "usermem \"userid\""
echo "Example:"
echo "usermem gwild"
exit 1
fi
echo " "

USER=$1
t=0
for j in `UNIX95= ps -e -o vsz=Kbytes -o ruser -o pid,args=Command-Line | sort -rnk1 | grep -v Kbytes | grep $USER | awk '{print $1}'`
do
t=`expr $t + $j`
done
echo "\nMemory claimed by $USER: $t Kbytes.\n"

Rgds...Geoff

Re: Memory usage GlancePlus versus ps

Gordon_10 — Fri, 19 Mar 2004 11:47:06 GMT

Close. I use the following:

#!/bin/ksh
mps=0
for sz in `ps -elf | grep $1 | grep -v grep | cut -c47-51`
do
mps=`expr $mps + $sz`
done
echo `expr $mps \* 4096`

And then pass in what I'm looking for:

$ mps.ksh rpc
1941504
$

This is the approximate size in bytes of all the rpc processes. In GlancePlus I know I'm looking at the wrong stuff because Virtual Memory and Res. Memory only come to (26680+9712)36392 somethings. Not sure what this is as page size does not work. So the question is what is GlancePlus showing me?

Re: Memory usage GlancePlus versus ps

Geoff Wild — Fri, 19 Mar 2004 12:02:31 GMT

I think it's your cut....

try this:

#!/bin/sh
mps=0
for sz in `ps -elf | grep $1 | grep -v grep | awk '{print $10}'`
do
mps=`expr $mps + $sz`
done
echo `expr $mps \* 4096`

Rgds...Geoff

Re: Memory usage GlancePlus versus ps

Gordon_10 — Fri, 19 Mar 2004 12:11:22 GMT

Thanks. Looks like expr doesn't care for the spaces left over by the cut.

Re: Memory usage GlancePlus versus ps

Geoff Wild — Fri, 19 Mar 2004 12:34:18 GMT

Here's a modified version - using UNIX95:

#!/bin/sh
# processmem - display memory claimed by a process
#
if [ $# -lt 1 -o $ $# -gt 1 -a $# -lt 4 $ ]
then
echo "Usage:"
echo "processmem \"process\""
echo "Example:"
echo "processmem rpc"
exit 1
fi
echo " "

PROCESS=$1

mps=0
#for sz in `ps -elf | grep $PROCESS | grep -v grep | awk '{print $10}'`
for sz in `UNIX95= ps -e -o vsz=Kbytes -o ruser -o pid,args=Command-Line | sort -rnk1 | grep -v Kbytes | grep $PROCESS | awk '{print $1}'`
do
mps=`expr $mps + $sz`
done
#echo `expr $mps \* 4096`
echo "\nMemory claimed by $PROCESS: $mps Kbytes.\n"