topic Re: Memory management in Operating System - HP-UX

Memory management

Joe Profaizer — Thu, 03 May 2001 14:51:14 GMT

What's a quick and easy way to identify memory allocated to individual processes? Or which processes are memory hogs?

Thanks!

..Joe

Re: Memory management

Vincenzo Restuccia — Thu, 03 May 2001 14:56:56 GMT

vmstat,top.

Re: Memory management

Joseph C. Denman — Thu, 03 May 2001 14:58:21 GMT

I would use:

top

...jcd...

Re: Memory management

A. Clay Stephenson — Thu, 03 May 2001 15:02:55 GMT

Glance is the tool of choice but a quick and dirty way to do this (and the price is right!)
is:
ps -el | grep -v "PID" | sort -r -k10,10

This will sort the process list in reverse order of SZ.

You probably also should look at shared memory via ipcs -ma.

Clay

Re: Memory management

James R. Ferguson — Thu, 03 May 2001 15:06:46 GMT

Hi Joe:

Several things come to mind:

Probably the easiest is this script from Bill Hassell:

# UNIX95= ps -e -o "user,vsz,pid,ppid,arg" | sort -rnk2 | more

'glance' and 'top' are very useful tools, too.

'ipcs' displays information in short format for the message queues, shared memory segments, and semaphores that are currently active in the system.

...JRF...

Re: Memory management

Juan González — Thu, 03 May 2001 15:10:48 GMT

Hi Joe,
with glance you can select a individual process and obtain a detailed report of the diferents kinds of memory it uses (text, data, stack, shmem).
Other tool that report individual use of memory is top and "ps -l"(in physical pages) but are less detailed and even can give a wrong measure.

Best regards
Juan Gonzalez
Best regard

Re: Memory management

Mladen Despic — Thu, 03 May 2001 18:30:42 GMT

Joe,

If you have a recent version of Glance, try this:

glance -adviser_only -syntax /opt/perf/examples/adviser/proc_mem_leak

Mladen