topic Re: Process related memory in Operating System - HP-UX

Process related memory

Sonison James — Tue, 05 Aug 2003 22:44:41 GMT

Hello,

I would like to know the following about a process:
1. Physical memory
2. Shared memory
3. Virtual memory
4. Virtual shared memory

Any pointers will be really helpful.

Thanks and regards
Sonison James

Re: Process related memory

Con O'Kelly — Tue, 05 Aug 2003 22:58:14 GMT

Hi

Glance is the best tool for this. If you don't have it installed you can get a 60 day free trial. Its on the application CD's.

Alternatively use:
# UNIX95= ps -el -o pid,comm,sz,vsz| grep -i -v pid | sort -nr -k 3,3 |head -15

This will give you the top 15 memory usage processes.

Other useful commands/tools:
# ipcs -mob
Shows shared memory utilisation.
Also have a look at shminfo utility. This does come with HP-UX but can be downloaded from the internet.

Cheers
Con

Re: Process related memory

Con O'Kelly — Tue, 05 Aug 2003 23:03:56 GMT

Sorry, meant to say shminfo does not come with HP-UX.

Download shminfo from:
ftp://hprc.external.hp.com/sysadmin/programs/shminfo/

Cheers
Con

Re: Process related memory

twang — Tue, 05 Aug 2003 23:05:38 GMT

process size:
# UNIX95= ps -eo "pid ruser pcpu vsz=Kbytes" -o comm
Note:
vsz: The size in kilobytes (1024 byte units) of the core image of the process. See column sz, above.

Re: Process related memory

Sonison James — Tue, 05 Aug 2003 23:05:45 GMT

Hello,

I am sorry, I forgot to mention that I would like to find the information programatically. I found a structure "pst_status" that is populated by pstat_getproc(), but I am not sure if it returns what I am looking for.

Thanks and regards
Sonison James

Re: Process related memory

twang — Wed, 06 Aug 2003 00:02:11 GMT

#include
#include

main (argc, argv)
int argc;
char *argv[];
{
struct pst_status pst;
int target = atoi(argv[1]);

if (pstat_getproc(&pst, sizeof(pst), (size_t)0, target) != -1)
{
(void)printf("Process %d started at %sand size is %d\n", target, ctime(&pst.pst_
start), sizeof(pst));
}
else
{
perror("pstat_getproc");
}
}

Re: Process related memory

Mike Stroyan — Thu, 07 Aug 2003 17:43:01 GMT

Here are a couple examples that report process sizes using pstat functions. The procvm_sizes.c program reports absolute sizes of all regions.

The procvm_sizes_glance.c program discounts the physical memory size of shared memory segments. It divides those sizes by the total number of references to each shared memory region by all processes on the system. That mimics the way that glance reports shared memory sizes.