Kernel Tuning in 11.23

[SSP_2]

Hi Experts,

Need a quick advise on kernel tuning for hpux11.23. If I modified some kernel parameters on 11.23 through SAM & choose to boot the system afterwards then wud the changes come into effect automatically at next reboot OR I have to do kmupdate & copy the system.SAM from build to /stand.

Pl suggest

P.S. - Everyone goin to contribute wud get the points awarded.

[Arunvijai_4]

Here is a good guide to kernel configuration, http://docs.hp.com/en/1219/tuningwp.html
Rebooting will make the changes get into effect.

-Arun

[Adisuria Wangsadinata_1 · Accepted solution]

Hi,

If you change the kernel parameter via SAM and you choose to booe the system afterwards, the changes will affect automatically once after the system start-up.

The changes will be apply on the system during the system startup processes. So after the system rebooted, you will get all the changes.

Hope this information can help you.

Cheers,
AW

[RAC_1]

Save current config.
man kconfig
kconfig -C "some_description" -x xxxx

Now do kctune -v on kernel parameter you want to change.

kctune -v "shammax"

If it says can be done online, then there is no need to reboot. tune parameter now
kctune "shmmax=xxxxx"

shutdown -ry 0 -> If paremeter requires a reboot.

Most of the 11.23 kernel tuning does not require a reboot.

[Hanwant Verma_1]

Try this link as well

http://docs.hp.com/en/5187-0701/ch03s02.html

Hanwant

[Prasanta Kumar Bindhani]

hi
If you are changing the kernel parameter through SAM then no need to worry. It will get effected after a reboot.

Regards

[Ted Buis]

Some kernel parameter can change without a reboot, but if changed parameter requires a reboot, it waits until the reboot for all changes.