topic Re: Kernel tunning in Operating System - HP-UX

Kernel tunning

ShivKumar_2 — Wed, 27 Feb 2002 14:37:34 GMT

Experts,
I need to make the KERNEL parameters of two hosts exactly similar, say HOST A and HOST B , whats the easiest way of doing it? Host A is a K-460 and the Host B is a L-2000

Thnks

Re: Kernel tunning

Helen French — Wed, 27 Feb 2002 14:48:04 GMT

Hi,

I would suggest you to take a printout of the kernel parameters from SAM-Kernel Configuration-Configurable parameters ; Choose Print option. Then apply the parameters in other system.

You can print this by a command too - sysdef

Do not try copying either vmunix or system files to other host as both are not identical !

Also why do you want to do this ? Is the OS version same ?

HTH,
Shiju

Re: Kernel tunning

ShivKumar_2 — Wed, 27 Feb 2002 14:54:38 GMT

Shiju,
Yes both the OS ver are same. 11.0 , the reason for doing this is , there are Oracle applications running on Host A(K-Class) , and the DBA here wants to have the same parameters for the HOST B(L-Class) as its going to be a testing system.

Thnks

Re: Kernel tunning

Helen French — Wed, 27 Feb 2002 15:02:20 GMT

Hi Shivkumar,

OK. I would suggest you to do the same as described. As it is only one system, it won't take long for you.

Make sure that you have backup of current kernel and settings ( safe side )

HTH,
Shiju

Re: Kernel tunning

Eric Ladner — Wed, 27 Feb 2002 15:05:46 GMT

Also, you can look at /stand/build/tune.h.

Be careful, however, some K class machines are not 64 bit (depends on the processor type, the HPPA-7xxx ones are not, the HPPA-8xxx are). Some of the kernel parameters that may be needed on the L class may not be present on the K class if there is a 32/64 bit difference on the machines.

I'd just use it for comparison purposes.

Also, you can copy over the tune.h (to another directory) and see what the differences are.

sort k_class_tune.h > k-tune.h
sort l_class_tune.h > l-tune.h

diff k-tune.h l-tune.h

That will highlight the differences.