topic Re: kernel modification from command line in Operating System - HP-UX

kernel modification from command line

Greg Purcell_1 — Wed, 21 Mar 2001 13:08:11 GMT

I am looking at using kmtune and mk_kernel to change the kernel and create a new one. Only, it doesn't like when I use kmtune to modify like msgtql=nproc*7. It'll take it, but will crap out when I run mk_kernel. Anything I'm missing? Do I need to tell it somehow to change dependencies?

Re: kernel modification from command line

Rita C Workman — Wed, 21 Mar 2001 13:18:33 GMT

I've been waiting for a need to change some parms on my 11 boxes, just to get to use kmtune.
Now maybe I'm missing something, it wouldn't be the first time....
From the way I read the manpage you could either set it equal to a specific value or have it increase the parm with the +. But I didn't understand it to say it would perform a calc (other than + ) by referencing the value of another parm and performing the calculation. Just = to value or + value.

But like I said.....I haven't had occassion to change any parms for awhile..so maybe my view is a misinterpretation.

/rcw

Re: kernel modification from command line

Karthik_2 — Wed, 21 Mar 2001 13:18:56 GMT

Greg ,
Double check the kmtune syntax .
It may not take a formula ..it can taek only a value .
Check kmtune man pages .

Karthik...

Re: kernel modification from command line

Paula J Frazer-Campbell — Wed, 21 Mar 2001 13:19:15 GMT

Hi
In 11.00 ncallout >= nproc, so I would imagine that you are not complying with this and the build is failing.

HTH

Paula

Re: kernel modification from command line

Greg Purcell_1 — Wed, 21 Mar 2001 13:37:28 GMT

I have checked the man pages, many times. There was no reference to changing by formula value. But, man pages don't always tell everything. Goal is to change msgtql from nproc*8 to nproc *7.

Re: kernel modification from command line

Karthik_2 — Wed, 21 Mar 2001 13:52:23 GMT

Greg,
I sure used kmtune to change the value with the numeric value and not with a formula .
Try giving the actual value instead of the formula .

Karthik...

Re: kernel modification from command line

Paula J Frazer-Campbell — Wed, 21 Mar 2001 13:52:55 GMT

Hi Greg

Fire up sam and play arround with these settings to get and note the full interdependancy, (be careful not to commit the changes)

Then knowing how each is tied together you can then use kmtune, changing the params in the correct order to achieve your aim.

HTH

Paula

Re: kernel modification from command line

Greg Purcell_1 — Wed, 21 Mar 2001 14:23:28 GMT

I need to use the formula due to the fact I want to script this to use on multiple boxes. These servers will vary from L to A classes therefore the kernel settings would vary from the servers.