topic Ulimit setting error for non-root user in Operating System - HP-UX

Ulimit setting error for non-root user

deepakb977 — Thu, 17 Aug 2017 07:06:06 GMT

Hello,

I have problem to set ulimit stack for non root user. below is the error shown:

time(seconds) unlimited
file(blocks) unlimited
data(kbytes) 4194300
stack(kbytes) 8192
memory(kbytes) unlimited
coredump(blocks) 4194303
nofiles(descriptors) 4000
>ulimit -Hs 12000
su: ulimit: The specified value exceeds the user's allowable limit.

But for root user I can do it.

Thanks,

Re: ulimit setting error for non-root user

Dennis Handly — Sun, 20 Aug 2017 00:52:09 GMT

This is as designed, only root can increase a value past the hard limit.

To increase it, you must change the kernel parm maxssiz.

Re: ulimit setting error for non-root user

deepakb977 — Sun, 20 Aug 2017 14:56:31 GMT

Hello Dennis,

Thanks for the reply. Yes, I can change for root user but I cannot change
for the other user.

Below are the kernel parameter value:

maxssiz 8388608 8388608 Immed

maxssiz_64bit 268435456 268435456 Immed

pa_maxssiz_32bit 83648512 Default Immed

pa_maxssiz_64bit 536870912 Default Immed

maxdsiz 1073741824 1073741824 Immed

maxdsiz_64bit 4294967296 4294967296 Immed

below is the value for normal user now:

$ ulimit -a

time(seconds) unlimited

file(blocks) unlimited

data(kbytes) 1048576

stack(kbytes) 8192

memory(kbytes) unlimited

coredump(blocks) 4194303

nofiles(descriptors) 65535

$ ulimit -s 8193

sh: ulimit: A specified flag is not valid for this command.

$

As per setting in kernel parameter value, it should be able to increase the
value but it doesn't. Is this need patch need to apply.

Thanks,

Deepak

Re: ulimit setting error for non-root user

Dennis Handly — Sun, 20 Aug 2017 15:29:41 GMT

> As per setting in kernel parameter value, it should be able to increase the value but it doesn't.

Have you changed maxssiz? (Your non-root sessions will have to logout.) Some links with more discussion:

https://community.hpe.com/t5/System-Administration/ulimit-and-maxssiz/m-p/4553461

https://community.hpe.com/t5/System-Administration/MAXSSIZ/m-p/2674302

https://community.hpe.com/t5/System-Administration/How-to-increase-stack-size/m-p/5849291