topic Re: memory usage info in Operating System - HP-UX

memory usage info

Christian Marquardt_1 — Mon, 11 Dec 2006 06:24:59 GMT

Hello,
on my HP/UX B.11.11 I need some informations about the memory usage.
Can anyone give me some ideas how to find it out?

kind regards
Christian

Re: memory usage info

Calandrello — Mon, 11 Dec 2006 06:28:41 GMT

friend
vmstat 1 10

Re: memory usage info

Pete Randall — Mon, 11 Dec 2006 06:39:46 GMT

My tool of choice would be Glance. If you don't have Glance, you'll need to work with vmstat, top and sar. The man pages for each of these commands would be a good place to start.

My favorite key indicator is to run "vmstat 1 10" and look at the "po" column. Double digit numbers under "po" indicates that you're paging out or swapping and this is a sure sign of poor performance due to lack of memory. Ideally, you would like to see nothing but zeroes under "po".

Pete

Re: memory usage info

Karsten Löperick — Mon, 11 Dec 2006 06:48:27 GMT

Hello Christian,

"dmesg" is also a good command to get memory informations.
And of course "top" gives you also usefull infos.

Greetings
Karsten

Re: memory usage info

Peter Godron — Mon, 11 Dec 2006 06:52:34 GMT

Chrstian,
for some suggestions for a quick check:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1033515

For more detailed info I would suggest Glance.

Re: memory usage info

Calandrello — Mon, 11 Dec 2006 07:19:06 GMT

Friend
you can use the command: top or glance but this and paid and needs license to function, you can use it as trial for 3 months. case is for analyzes of more advanced performance would be necessario to use glance plus pak therefore the same has the collector of analyzes that it allows to collect given to generate grafic of analyzes for perfview.

Re: memory usage info

siva0123 — Mon, 11 Dec 2006 07:32:12 GMT

Hi,

As already said in these thread , u can use

1. dmesg
2. swapinfo
3. glance
4. SAM =>Performance monitor => system properties
5.vmstat

Read the man pages for the above commands to know more

Thanks,
Siva

Re: memory usage info

Yogeeraj_1 — Mon, 11 Dec 2006 07:40:28 GMT

hi Christian,

if you want historical information about memory utilisation, then you should also look into mwa.

hope this helps too!

kind regards
yogeeraj

Re: memory usage info

Jannik — Mon, 11 Dec 2006 07:59:00 GMT

Even if this document is for solaris i find it usefull for all UNIX variations some more that others :-).
http://www.adminschoice.com/docs/iostat_vmstat_netstat.htm

It will give some knowhow as to how the standard UNIX performance tools works.

Re: memory usage info

PVR — Mon, 11 Dec 2006 08:10:05 GMT

Friend,

Please use 'glance -m'

It is more accurate compare to top and sar utility.

-PVR

Re: memory usage info

Christian Marquardt_1 — Mon, 11 Dec 2006 08:38:07 GMT

If I look into SAM =>Performance monitor => system properties on the page "memory" I find the following:
Physical Memory: 16396.7 MB
Real Memory:
Active: 2418379.0 KB
Total: 4815660.5 KB

Now I find here 16 GB physical RAM and total memory 4.8 GB ... I think total memory and physical memory is the same?!?!?!?
Why the total memory shows only 4.8 GB instead of the 16 GB physical memory?

regards
Christian

Re: memory usage info

Peter Godron — Mon, 11 Dec 2006 08:50:42 GMT

Christian,
please read the following:
http://www.chapelhill.homeip.net/horton/copies/MemoryUsage-HPUX.htm

It covers a whole range of memory definitions and tools.

Also, a ITRC thread covering some more topics of a similar nature:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=45018

Re: memory usage info

Geoff Wild — Mon, 11 Dec 2006 09:08:19 GMT

Download an compile the attached c program (will compile with HP-UX native compiler - just cc it)

Output like:

# memdetail
Memory Stat total used avail %used
physical 10080.0 3115.4 6964.6 31%
active virtual 657.2 534.5 122.7 81%
active real 313.3 220.8 92.5 70%
memory swap 7697.2 1771.9 5925.3 23%
device swap 26528.0 382.6 26145.4 1%

Rgds...Geoff

Re: memory usage info

Peter Godron — Thu, 14 Dec 2006 04:47:18 GMT

Christian,
could you please complete the thread by awarding points to helpful answers and summarising the solution for you.

This will help resolution of similar problems in the future.