topic Re: Kernel change for open file descriptors in Operating System - HP-UX

Kernel change for open file descriptors

MikeL_4 — Tue, 02 Aug 2005 20:52:47 GMT

I had this request from DBA foe Oracle 9i for kernel changes and I'm not sure exactly what parameters he is referring to. Can anyone assist ??

Need to set the hard limit for open file descriptors to 8192 and maximum size of data segment to 1572864.

/usr/bin/ulimit -Hn
2048
/usr/bin/ulimit -Hd
1048576
/usr/bin/ulimit -n 8192
/usr/bin/ulimit[7]: ulimit: The specified value exceeds the user's allowable limit.
/usr/bin/ulimit -d 1572864
/usr/bin/ulimit[7]: ulimit: The specified value exceeds the user's allowable limit.

Re: Kernel change for open file descriptors

Denver Osborn — Tue, 02 Aug 2005 21:08:17 GMT

you can open up sam, kernel configuration, configurable parameters... you'll most likely look at maxfiles, maxfiles_lim, maxuprc, maxdsiz and nfile.

Most of these should have a help files to explain what they do, if you use the sam gui. Otherwise search docs.hp.com for the params to get an overview of each.

-denver

Re: Kernel change for open file descriptors

Warren_9 — Tue, 02 Aug 2005 21:15:56 GMT

hi,

you need to modify the kernal parameters, not using the ulimit.

open file: maxfiles
max data size: maxdsiz and maxdsiz_64bit

GOOD LUCK!

Re: Kernel change for open file descriptors

generic_1 — Tue, 02 Aug 2005 21:21:38 GMT

You will need to reboot your machine for the change to take effect in most cases on kernel changes so you know. SAM is the prefered and recommended option by HP to make kernel changes.

Re: Kernel change for open file descriptors

MikeL_4 — Wed, 03 Aug 2005 06:57:44 GMT

Thanks