Resident memory usage (whitout top)

[Marcelo De Florio_1]

How can i obtain the resident memory usage for a one process (whitout top)?

MDF

[A. Clay Stephenson]

Hi Marcelo:

I would do something like this:

UNIX95= ps -p ${MYPID} -o "args,vsz,sz"

vsz is the size in KB of the core image and sz in the total number of text,data, and stack pages of the process. The space after UNIX95= is required.

Clay

[Marcelo De Florio_1]

Clay, thanks, but i need the resident size of process, vsz or sz return the size of process. Can i obtain this?

MDF

[Praveen Bezawada]

Hi
You can use the below commands

sar -o sarfile 2 2 # Produces a binary sarfile
sar -Af sarfile > sar.report

You can get the process resident statistics in the report file.

...PRB...

[nancy rippey]

If you have glance installed you can find it that way.
start glance
select 's' for process
entry the pid

If you are using the gui version of glance
start gpm
select reports
process list
click on the process name
select reports
process memory regions
for further info.
select reports again
process resources

[linuxfan]

Hi Marco,

To sort the process based on the resided memory sizes,
UNIX95= ps -e -o vsz=Kbytes -o pid,args=Command-Line|sort -rnk1

you can put this in your .kshrc as a variable as well. For eg:
psmem="UNIX95= ps -e -o vsz=Kbytes -o ruser,pid,args=Command-Line|sort -nrk2"
(once you source your .kshrc, then just run psmem and it will list out your process sorted through the resident memory sizes-the output will list the size, loginid, pid, process name).

To just look for a process do a
psmem |grep $PID

-HTH
I am RU

[linuxfan]

Hi Marco,

Please disregard my previous post, it does not list you the RSS of the process, like clay said, vsz lists the size of the core image of the process and sz lists the size in physical pages of the core image including text, data and stack space.
Some of the other options is to use the -d option for top and grep for the RSS value. or like nancy said, you might have to use glance.

The question i had is are you trying to achieve this in a script?

-Regards
I am RU

[A. Clay Stephenson · Accepted solution]

Hi Marcelo:

Without top or Glance, you will have to do this with c using the pstat_getdynamic() function to get an array of processes and then using the pstat_getproc() to loop through the
array until you find your pid. The pst_status struct contains the data you want although at best it is an approximation since this data is constantly changing.

Someone may have written a perl module to do this but since it is so easy in C that whenever I've needed to do anything like this, I can usually whip it up in a few minutes.

Clay

[Wodisch]

Hello Marcelo,

if you can find a "quite" time on your system, where no
(or almost no) processes are started anew, try to do
something like
vmstat 1 10
start-your-process-here
vmstat 1 10

"vmstat" usually needs a few seconds to "settle", so
doing it ten timesshould take care of that ;-)
And, well, if nothing else is started in between the two
"vmstat" commands, just subtract the averages of the,
say, last 3 of each of them.
The column you are interested in is "free" and its unit
is in "pages" of course, which usually are 4096bytes
each (check with "chatr" onto the codefile of your
process).
Not really precise, but it should give you an idea about
it ;-)

HTH,
Wodisch

[Jerry Zhang]

This command will give you RSS in 4MB pages:
$ ps -elf |grep Proc_name |grep -v grep |awk '{print $10}'