topic Re: memory calculation in Operating System - HP-UX

memory calculation

navin — Sun, 11 May 2008 21:15:19 GMT

hello all,
We are running a monitoring tool which helps get a free memory info available in a hp system.I have to compare it with the output of top command ,but it was not so clear to me.Can you let me know how do we calculate the free mem(physical) using top command.
Thanks

Re: memory calculation

Asif Sharif — Mon, 12 May 2008 03:23:23 GMT

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1032905
http://forums11.itrc.hp.com/service/forums/questionanswer.do?admit=109447626+1210565985087+28353475&threadId=1180482

CPU = Processor number on which the process is executing (only on multi-processor
systems).

TTY = Terminal interface used by the process.

PID = Process ID number.

PSET = ID of the processor set to which the
processor belongs.This is shown only when -P option is used.

PRI = Current priority of the process

NI = Nice value ranging from -20 to +20

SIZE = Total size of the process in kilobytes.This includes text, data, and stack.

RES = Resident size of the process in kilobytes.The resident size information is, at best,an approximate value.

STATE = Current state of the process. The various states are sleep, wait, run, idl, zomb, orstop.

%WCPU = Weighted CPU (central processing unit) percentage.

%CPU = Raw CPU percentage. This field is used to sort the top process

http://docs.hp.com/en/B2355-60130/top.1.html

Regards,
Asif Sharif

Re: memory calculation

navin — Mon, 12 May 2008 03:34:14 GMT

Hello Thanks so much ,
Actually by mistake , i have mentioned as top. But it is not.I was checking the mem info in sam which shows me virtaul,real ,etc.I need to know how can i match this to get the total memory usage(physical and swap) in the system
Thanks Much Again

Re: memory calculation

Asif Sharif — Mon, 12 May 2008 03:38:21 GMT

Hi Navin,

You can check with swapinfo command.

# swapinfo -tam
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 2048 0 2048 0% 0 - 1 /dev/vg00/lvol2
reserve - 150 -150
memory 2048 431 1617 21%
total 4096 581 3515 14% - 0 -
#

Regards,
Asif Sharif

Re: memory calculation

Asif Sharif — Mon, 12 May 2008 03:41:26 GMT

Read the Aashique response from below mentioned thread about kmeminfo sctipt.
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1220246

Regards,
Asif Sharif

Re: memory calculation

Yogeeraj_1 — Mon, 12 May 2008 03:47:52 GMT

hi navin,

please have a look at the following url:
ftp://hprc.external.hp.com/memory.htm#topcommand

e.g.
Memory: 515216K (441660K) real, 1537516K (1434024K) virtual, 1365132K free

>Can you let me know how do we calculate the free mem(physical) using top command.

Here it is 1,365,132K free (i.e the last column)

hope this helps!
kind regards
yogeeraj

Re: memory calculation

Dennis Handly — Mon, 12 May 2008 07:57:40 GMT

>Can you let me know how do we calculate the free memory

This may be a vague piece of info if you have lots of buffer cache that can be reused for virtual memory.
A more useful statistic is how much swapping your are doing, see vmstat(1).