kernel parameter

[Fauziah Mahdan]

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

[RAC_1]

I do not think those parmaters are there anymore.

[Sivakumar TS]

Hello Fauziah,

Use

#kctune =

Hope this helps,

Siva

[Ludovic Derlyn]

hi,

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

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

Regards

L-DERLYN

[Ludovic Derlyn]

hi,

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

regards

L-DERLYN

[Sivakumar TS]

Hi,

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

check the above doc to get the tunable parameters.

Regards,

Siva

[Fauziah Mahdan]

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


Thanks all
Fauziah Mahdan

[Asif Sharif]

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

[Ludovic Derlyn]

hi,


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

sorry it's a mistake

maxswapchunk is a obsolete value in Itanium

[Torsten.]

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

[inventsekar_1]

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.

[Srikanth Arunachalam]

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

[inventsekar_1]

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)?

[Fauziah Mahdan]

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

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

[inventsekar_1 · Accepted solution]

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.