topic Re: ulimit in Operating System - HP-UX

ulimit

IZN — Mon, 08 Aug 2005 03:25:37 GMT

Hi,
I would like to increase the ulimit parameters.

data seg size is 1,048,576 and should be 2,045,464
corefilesize is 2,097,151 and shuld be 4,164,303
ulimit -n is 1,024 and shuld be 2,048

Which of the kernel parameters are to modifi to increase the ulimit size?

Many thanks

Re: ulimit

Alex Lavrov. — Mon, 08 Aug 2005 03:38:54 GMT

Unlimit values are changed with "ulimit" command and they depends on the kernel parameters.

"data seg size" is corresponding to maxdsiz parameter.

core file: Bourne-style shells: "ulimit -c 0"
C-style shells: "limit coredumpsize 0"

These threads can help you a lot:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=813713
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=728058

Alex.

Re: ulimit

IZN — Mon, 08 Aug 2005 04:00:21 GMT

Hi,
you can modify the "ulimit -d" by the kernel parameter maxdsize.
and the "ulimit -n" can modify by masfile.
But I haven't found the corefilesieze (ulimit -c)
"ulimit -c 0" will not unlimit the size I think. It will be set to 0...

Re: ulimit

IZN — Mon, 08 Aug 2005 04:02:10 GMT

Hi,
you can modify the "ulimit -d" by the kernel parameter maxdsize.
and the "ulimit -n" can modify by maxfile.
But I haven't found the corefilesieze (ulimit -c)
"ulimit -c 0" will not unlimit the size I think. It will be set to 0...

Re: ulimit

morganelan — Mon, 08 Aug 2005 04:07:53 GMT

Hi,
I think this following kernel parameters that must be changed according to ulimit changes:
maxdsiz,maxdsiz_64bit

Re: ulimit

Bill Hassell — Mon, 08 Aug 2005 09:32:54 GMT

NOTE: ulimit -c 0 means that *NO* corefile will be created at all. The easiest method is to set ulimit -c to "unlimited":

ulimit -c unlimited

Note that ulimit refers to programs, not an OS crash dump. There is no kernel parameter to limit the size of a program core dump.

Re: ulimit

Balasubramanian S — Mon, 08 Aug 2005 23:06:51 GMT

Note: When you set the resource values through the ulimit command, it affects only the current execution environment.

Thanks, Bala S