topic Re: swapinfo question in Operating System - HP-UX

swapinfo question

John_1017 — Wed, 09 Feb 2005 10:00:02 GMT

Hello

Can someone tell if the swap space is enough here? It shows dev, reserve, memory. Can you tell what shows the swapspace

# swapinfo
Kb Kb Kb PCT START/ Kb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 1048576 0 1048576 0% 0 - 1 /dev/vg00/lvol2
reserve - 385920 -385920
memory 1544168 487600 1056568 32

Re: swapinfo question

Peter Godron — Wed, 09 Feb 2005 10:04:04 GMT

Kiran,
look fine to me.
Your disk swap is 0% used and memory is 32% used.
Are you having a problem?
Regards

Re: swapinfo question

John_1017 — Wed, 09 Feb 2005 10:15:46 GMT

Hello, Thanks. I got a free memory alert from somebody .. which is very unclear. It just says FreeMem/Pages .. that's it. I was wondering why .. Any idea if I have to check anything else like pages used by a program etc ...

Re: swapinfo question

Peter Godron — Wed, 09 Feb 2005 10:27:44 GMT

Kiran,
without detailed messages could it be that it is an application message? Your system may be set up to limit the amount of memory per user/process.
If you can't find any other messages you may want to try a
string | grep
to check if it comes from the application.
Regards

Re: swapinfo question

John_1017 — Thu, 17 Feb 2005 14:20:45 GMT

Hi,

How about this?

# swapinfo -tam
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 1024 29 995 3% 0 - 1 /dev/vg00/lvol2
reserve - 955 -955
memory 1508 755 753 50%
total 2532 1739 793 69% - 0

Is it bad to have dev used 3%? sam shows it differently. It says swapinfo used= 964 mb avail=1024 mb. Any ideas?

Re: swapinfo question

B. Hulst — Thu, 17 Feb 2005 16:21:11 GMT

Hi,

Install Glance (trial or buy version).

You see in one 'glance' the swap information
and system's performance.

A very good tool, downloadable from www.hp.com

Regards,
Bob

Re: swapinfo question

Kevin Wright — Thu, 17 Feb 2005 21:47:38 GMT

both outputs look just fine. Doesn't look like much if any paging is happening, run a vmstat to check.

Pseudo swap is enabled, that's the memory line in swapinfo.

Re: swapinfo question

Con O'Kelly — Thu, 17 Feb 2005 23:03:48 GMT

Hi

You may want to check your memory utilization.
As the others have said glance is an excellent product for this.
Otherwise from command line use:
# vmstat 1 2 | tail -1 | awk '{ print $5*4/1024}'

This will give you free memory in MB.

Cheers
Con

Re: swapinfo question

John_1017 — Fri, 18 Feb 2005 09:33:14 GMT

Hello all,

Thanks for the help. glance shows the following details:

Total VM : 70.1mb Sys Mem : 146.4mb User Mem: 1.47gb Phys Mem: 2.00gb
Active VM: 35.5mb Buf Cache: 307.2mb Free Mem: 86.0mb

Mem Util: 96%
Swap Util 69%

--------

# vmstat 1 2 | tail -1 | awk '{ print $5*4/1024}'
105.344

-----

However, sam shows swapspace used=avail=1024mb

Its not clear why sam shows it completely different from what glance or swapinfo -tam shows.

Does it mean more memory should be added to the system?