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kernel bigger on some systems

 
Tim Nelson
Honored Contributor

kernel bigger on some systems

I have a number of N4000 systems all running HPUX 11i. Two of 5 systems have kernels that are 30MB or so in size. The others are about 15MB.
Can anyone point out some reasons why the /stand/vmunix kernel image would be twice the size of the others. I have been trying to compare and have yet to find any tunable differences that could account for the 2x size.

Thanks in advance.
7 REPLIES 7
Biswajit Tripathy
Honored Contributor

Re: kernel bigger on some systems

Systems with larger kernels might also have more
number of kernel modules. Run kmadmin(1M)
command (see manpage for exact usage) to see
how many modules are there in each of the
systems.

- Biswajit
:-)
Steven E. Protter
Exalted Contributor

Re: kernel bigger on some systems

Hardware differences and make a difference. Patching can add a lot to the kernel. If the systems are identical and have identical software and hardware, and are patched exactly the same then the kernel should be similar in side.

Other factors:
Kernel parameters
forumla's in the kernels


Add in software such as serviceguard and fiber channel software can add a lot to a kenrel.

SEP
Steven E Protter
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
Steven E. Protter
Exalted Contributor

Re: kernel bigger on some systems

My first step would be to compare kmtune output on the two machines.

SEP
awake, doing system maintenance.
Steven E Protter
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
Zeev Schultz
Honored Contributor

Re: kernel bigger on some systems

software (drivers,patches) most probably.
So computers don't think yet. At least not chess computers. - Seymour Cray
A. Clay Stephenson
Acclaimed Contributor

Re: kernel bigger on some systems

Momma says, "kernel is as kernel does".
If it ain't broke, I can fix that.
Trond Haugen
Honored Contributor

Re: kernel bigger on some systems

Take a close look at the things mentioned.
My experience is that systems that are said to be configured the same seldom are.

Regards,
Trond
Regards,
Trond Haugen
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Tim Nelson
Honored Contributor

Re: kernel bigger on some systems

Thanks for the ideas.
Have not found any obvious items yet, at least nothing that would account for 2x the size.
Will have to rebuild a couple times with some different settings.

Thanks !!