topic Re: kernel parameter in Operating System - HP-UX

kernel parameter

Fauziah Mahdan — Thu, 06 Jul 2006 04:03:14 GMT

Hi all from hpux11.23, how to add new kernel parameter e.g maxswapchuncks=16384 and
semmap=4098.
What is the command to add this parameter?

Thanks
Fauziah

Re: kernel parameter

RAC_1 — Thu, 06 Jul 2006 04:13:20 GMT

I do not think those parmaters are there anymore.

Re: kernel parameter

Sivakumar TS — Thu, 06 Jul 2006 04:14:15 GMT

Hello Fauziah,

Use

#kctune =

Hope this helps,

Siva

Re: kernel parameter

Ludovic Derlyn — Thu, 06 Jul 2006 04:16:49 GMT

hi,

Use kctune "variable"="valeur" or kcweb -F (launch a brower)

It's seems that maxswapchuncks didn't exist on itanium,

Regards

L-DERLYN

Re: kernel parameter

Ludovic Derlyn — Thu, 06 Jul 2006 04:20:17 GMT

hi,

It's seems that maxswapchunk is called swchunk on itanium
Anybody can confirm ?

regards

L-DERLYN

Re: kernel parameter

Sivakumar TS — Thu, 06 Jul 2006 04:23:27 GMT

Hi,

http://docs.hp.com/en/5187-0701/ch03s03.html

check the above doc to get the tunable parameters.

Regards,

Siva

Re: kernel parameter

Fauziah Mahdan — Thu, 06 Jul 2006 04:23:49 GMT

thanks
The right command for my server is kctune -u =

Thanks all
Fauziah Mahdan

Re: kernel parameter

Asif Sharif — Thu, 06 Jul 2006 04:25:11 GMT

Hi Fauzaih,

You can do it from sam.

SAM>Kernel Configuration>Configurable Parameters >find maxswapchuncks and semmap and select it and then come in Action TAB, After that Modify Configurable Parameter. and then Apply.

It will ask to reboot machine.

Regards,
Asif Sharif

Re: kernel parameter

Ludovic Derlyn — Thu, 06 Jul 2006 04:42:05 GMT

hi,

"It's seems that maxswapchunk is called swchunk on itanium"

sorry it's a mistake

maxswapchunk is a obsolete value in Itanium

Re: kernel parameter

Torsten. — Thu, 06 Jul 2006 04:49:26 GMT

Please see the release notes:

"System-V IPC Kernel Tunable Parameter (semmap)(Obsolete): The memory allocation of semaphore sets previously controlled by semmap is now done dynamically by the kernel. The semmap kernel parameter is no longer tunable."

http://docs.hp.com/en/5991-5320/ch03s08.html

Re: kernel parameter

inventsekar_1 — Thu, 06 Jul 2006 06:19:04 GMT

HI fauziah,

r u sure, its a 11.23 box?

use the command "kctune" if it is not 11.23, it will tell command not found.
if its 11.23 it will give u the list of all kernel parameters and its value, dynamic or static also.

attached the kernel parameters list in 11.23

and from the above results u knew how to change the kernel parameter.

Re: kernel parameter

Srikanth Arunachalam — Fri, 07 Jul 2006 03:18:35 GMT

Hi Fauziah,

Have a look at the thread I raised 2 weeks before.

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1038287

If a parameter already doesnt exist, you need to perform kctune -u -s (-u option is important).

Thanks,
Srikanth

Re: kernel parameter

inventsekar_1 — Fri, 07 Jul 2006 03:30:10 GMT

HI all,
maxsawpchunks and semmap is not available with 11.23. isnt?
in my previous reply, i posted the list of all kernel parameters.(u can do a "kctune" or kctune -v in ur system).

now, those two parameters available or not(in 11.23)?

Re: kernel parameter

Fauziah Mahdan — Fri, 07 Jul 2006 03:39:10 GMT

Hi all yes it was Hp itanum 11.23 version
and the command that i use is kctune -u =

and save it..thanks all........

Re: kernel parameter

inventsekar_1 — Fri, 07 Jul 2006 04:44:23 GMT

HI Fauziah,
---------------------
"it was Hp itanum 11.23 version
and the command that i use is kctune -u ="
---------------------
The semmap kernel parameter is no longer tunable in 11.23 and maxswapchuncks not available(i think).

can u update what parameter u changed?
can u update points to those who spent time for you.