topic Re: kernel tuning issue in Operating System - HP-UX

kernel tuning issue

ln_unix — Fri, 15 Oct 2010 16:44:03 GMT

Kindly guide me for this, i have make the changes on the parameter but problem is looping around the tuning.

khp010a1-root:/root> kctune nkthread=16488
ERROR: The values of maxfiles (10000) and maxfiles_lim (4096) do not
satisfy the requirement:
maxfiles <= maxfiles_lim
khp010a1-root:/root> kctune maxfiles_lim=10000
ERROR: The values of semmnu (16384) and nproc (4200) do not satisfy
the requirement:
nproc >= semmnu + 4
khp010a1-root:/root> kctune nproc=16388
ERROR: The values of nproc (16388) and nkthread (8416) do not satisfy
the requirement:
nkthread >= nproc + 100
khp010a1-root:/root> kctune nkthread=16488
ERROR: The values of maxfiles (10000) and maxfiles_lim (4096) do not
satisfy the requirement:
maxfiles <= maxfiles_lim

Re: kernel tuning issue

James R. Ferguson — Fri, 15 Oct 2010 17:20:06 GMT

Hi:

Depending on how you performed the 'kctune', you might just reboot (or reboot using the previous kernel configuration).

It seems that you ignored several constraints. It's not good to fool Mother Nature.

Regards!

...JRF...

Re: kernel tuning issue

Dennis Handly — Fri, 15 Oct 2010 18:23:47 GMT

Have you tried setting all of the values at once?
Or you may have to reduce some of the value before you can increase the others.

Have you tried printing out the values of all of these parms?

Re: kernel tuning issue

Victor Fridyev — Sat, 16 Oct 2010 06:42:31 GMT

Hi,

Try to update the parameters in SAM, it has help for each parameter, which has dependencies.

HTH

Re: kernel tuning issue

Viktor Balogh — Sat, 16 Oct 2010 11:51:07 GMT

Hi,

You will never enforce these values. Configure it with SAM, it will show you the formula and the suggested value.

Regards,
Viktor

Re: kernel tuning issue

vishnu.khandare — Tue, 19 Oct 2010 04:01:32 GMT

Hi,
Best practice to change the kernel parameter is to save the old copy of kernel as date_old.
Change the kernel parameters in SAM,
calculate it, before it changes then if the value is correct to set and its dynamic parameters it will be changed, if not it will show u the dependices of other parameter with relation tht greater than or less than equal to particular parameter is depends.

Hope this solves ur query.

Regards
Vishnu Khandare