topic Re: Kernel parameter setting is lost after each reboot... in Operating System - HP-UX

Kernel parameter setting is lost after each reboot...

Rui Vilao — Tue, 04 Sep 2001 09:40:57 GMT

Greetings,

I have modified on HP-UX 11i some kernel parameters for a given application:

msgmax 32768
msgmnb 32768
shmseg 120
msgseg 7168

After a reboot the setting for msgmax (dynamic, no reboot required) is lost.

How can I prevent this and make it persistent

Thanks in advance,

Rui.

Re: Kernel parameter setting is lost after each reboot...

eran maor — Tue, 04 Sep 2001 09:50:51 GMT

Hi

you can put this params in the system file in /stand/system

* Tunable parameters
msgmax 32768
msgmnb 32768
shmseg 120
msgseg 7168

and compile the system again

# cd /stand/build
# system_prep -s system
# mk_kernel -s system

the next time it will boot the kernel with be set

i m checking now why your kernel params didnt update but i think that you didnt compile the kernel and the afectt didnt come up after the reboot but like i said , checking

Re: Kernel parameter setting is lost after each reboot...

Praveen Bezawada — Tue, 04 Sep 2001 09:56:59 GMT

Hi
Try using SAM to changes the kernel.

...BPK...

Re: Kernel parameter setting is lost after each reboot...

Michael Tully — Tue, 04 Sep 2001 10:03:50 GMT

Hi,

You haven't actually said how you made these changes to the kernel, but to save all of the changes and reboot your system please follow the following:

# cd /stand/build
# /usr/lbin/sysadm/system_prep -s system
# vi system
make your changes and save the file
# mk_kernel -s system
# kmupdate (this tells the system that at the next reboot a new kernel has been generated and to load it)
# cd /
# shutdown -r -y now

HTH
-Michael

Re: Kernel parameter setting is lost after each reboot...

harry d brown jr — Tue, 04 Sep 2001 11:18:57 GMT

Changing the parameter msgseg requires a new kernel to be built, the others in 11i are as you said, are dynamic. How are you making these changes? With sam, it should ask you to build a new kernel when you modify "msgseg", and the dynamic ones should stay persistent.

Re: Kernel parameter setting is lost after each reboot...

Rui Vilao — Sat, 15 Sep 2001 16:24:50 GMT

It didn?t work with SAM.
But with the command line instructions it worked!

Thank you all for your help!

Regards,

Rui.