topic Re: sam limits on kernel parameters in Operating System - HP-UX

sam limits on kernel parameters

Lai Nee Shyang_1 — Mon, 03 Dec 2001 09:54:22 GMT

Hi There,

Anyone knows where does SAM keeps its config file for kernel compliation. My Sam keeps telling me that I've exceeded the maxfile and maxfile_lim for my systems' kernel. I remember there is a file somewhere that defines all the tunable kernel parameters.

Thanks

Lai

Re: sam limits on kernel parameters

Steven Sim Kok Leong — Mon, 03 Dec 2001 09:57:50 GMT

Hi,

Mind showing us your kmtune command output ie.

# kmtune

This would show us the value you set for the kernel parameter in your currently running kernel.

What value are you trying to change it to?

Hope this helps. Regards.

Steven Sim Kok Leong
Brainbench MVP for Unix Admin
http://www.brainbench.com

Re: sam limits on kernel parameters

Frederic Sevestre — Mon, 03 Dec 2001 10:02:14 GMT

Hi,
If you want to generate a text file based on the current kernel :
# cd /stand/build
# /usr/lbin/sysadm/system_prep -v -s system
The generated file "system" contains all informations about kernel.
Take careful of the extistant "system" file which may not refect the current kernel.
Fr??d??ric

Re: sam limits on kernel parameters

Marcin Wicinski — Mon, 03 Dec 2001 10:11:18 GMT

Hi,
As far as I know maxfile_lim is dynamic tunable and SAM insist on using kmtune -s -u command. You can use command:
# kmtune -s maxfiles_lim=2048
and then kompile a new kernel.

Re: sam limits on kernel parameters

Lai Nee Shyang_1 — Mon, 03 Dec 2001 10:14:21 GMT

Hi .

I was changing the value for nfile. But strange thing is that, when I triggered SAM-> kernel config, it tells me that the maxfile and maxfile_lim has exceeded the limit, and it automatically changes it from 3000 to 2048 and 5000 to 2048 for maxfile and maxfile_lim respectively.
The nfile limit was ok.

I'm aware that I can do this via changing the systems file in /stand, but just to be in sync with the rest of the adminitrator (I'm not the only administrator), we have choose to use sam to do this instead.

Thanks.

Lai

Re: sam limits on kernel parameters

Bill McNAMARA_1 — Mon, 03 Dec 2001 10:59:57 GMT

# sysdef

should tell you what you need.

Later,
Bill

Re: sam limits on kernel parameters

James R. Ferguson — Mon, 03 Dec 2001 11:26:01 GMT

Hi Lai:

Have a look in '/usr/conf/master.d/core-hpux'. This is one of the master files used by 'config' to build a kernel.

Regards!

...JRF...

Re: sam limits on kernel parameters

Sanjay_6 — Mon, 03 Dec 2001 13:51:09 GMT

Hi Lai,

Use "kmtune -l" to get the kernel parameter list and also the max and min value for all parameters. Redirect the output to a file to get a text output.

kmtune -l > /tmp/ker_para_list

Hope this helps.

Regds

Re: sam limits on kernel parameters

Sanjay_6 — Mon, 03 Dec 2001 13:54:57 GMT

Hi Lai,

Here is a procedure for the way on how you can increase the kernel parameter values for maxfile and maxfile_lim beyond the suggested value using sam,

http://us-support.external.hp.com/cki/bin/doc.pl/sid=bbfb456e0453b9553b/screen=ckiDisplayDocument?docId=200000055459688

Hope this helps.

Regds

Re: sam limits on kernel parameters

Lai Nee Shyang_1 — Tue, 04 Dec 2001 00:24:54 GMT

Hi there

Thanks to all , u guys are great!

Lai