topic how can i Configurable Kernel Parameters in Operating System - HP-UX

how can i Configurable Kernel Parameters

hnlixm — Mon, 26 Apr 2010 01:59:28 GMT

My paprogram catch an exception like
"ava.io.IOException: Too many open files (errno:24)";and some body suggest me modify
nfile, maxfiles and maxfiles_lim。but i can't find the file /etc/conf/master.d.

somebody can help me

best wishes!

Re: how can i Configurable Kernel Parameters

Dennis Handly — Mon, 26 Apr 2010 02:06:40 GMT

What HP-UX version are you on? Did you try using SAM to change the kernel parms?

Re: how can i Configurable Kernel Parameters

hnlixm — Mon, 26 Apr 2010 02:14:43 GMT

B.11.23 U ia64 (tc)

Re: how can i Configurable Kernel Parameters

SoorajCleris — Mon, 26 Apr 2010 02:29:56 GMT

Hi,

#kctune

#kmtune

sam

Regards,
Sooraj

Re: how can i Configurable Kernel Parameters

SoorajCleris — Mon, 26 Apr 2010 02:32:51 GMT

Hi,

kctune is the command ror 11.23

Just run the command, are you able to get the output?

#kctune nfile

will give you current value
and

#kctune nfile=xxxxx will set new value

Regards,
Sooraj

Re: how can i Configurable Kernel Parameters

Dennis Handly — Mon, 26 Apr 2010 02:34:54 GMT

>B.11.23 U ia64

As Sooraj mentioned, you should be able to use kctune(1m) to change those kernel parms.
What is the current nfile(1m) value?

Re: how can i Configurable Kernel Parameters

Raj Briden — Mon, 26 Apr 2010 02:35:54 GMT

check for /usr/conf/master.d

Re: how can i Configurable Kernel Parameters

hnlixm — Mon, 26 Apr 2010 02:40:19 GMT

is anything damage when i use the kctune command?
thanks

Re: how can i Configurable Kernel Parameters

SoorajCleris — Mon, 26 Apr 2010 02:52:12 GMT

If you use
#kctune

It will show you the current tunalbe values.

But when you set a value using

#kctune=

Then it changes the kernel, If you are going to change a static parameter it will ask for reboot.

parameter values must be reviewd and verified bofore you implement that. The wrong values can lead to system crash/non bootable system/ performance.

Please take an Ignite backup beofre you change anything

Take backup of the kernel

Regards,
Sooraj

Re: how can i Configurable Kernel Parameters

madhuchakkaravarthy — Mon, 26 Apr 2010 02:54:46 GMT

hi

if u have a proper backup, u can go a head.

regards

MC

Re: how can i Configurable Kernel Parameters

madhuchakkaravarthy — Mon, 26 Apr 2010 02:57:01 GMT

hi

take a copy of stand and vmunix ,, so that if u have problem u can come up from old values.

make sure that u have an ignite backup

regards

MC