ulimit problem

[SSP_1]

Hi,

I am trying to change nofiles value through "ulimit -n" but it's giving me an error. I am using posix shell [/usr/bin/sh]. The error and the commands tried are as below :-

$ env | grep -i shell
SHELL=/usr/bin/sh
$ ulimit -a
time(seconds) unlimited
file(blocks) unlimited
data(kbytes) 262144
stack(kbytes) 8192
memory(kbytes) unlimited
coredump(blocks) 4194303
nofiles(descriptors) 512
$ ulimit -n 1025
su: ulimit: The specified value exceeds the user's allowable limit.

[RikTytgat · Accepted solution]

Hi,

ulimit has 2 kinds of limits: soft and hard.

A user can only increase its soft limit up to the hard limit.

Use ulimit -Ha
ulimit -Sa

If, for the nofiles, your hard limit < 1025, then that is te reason for the error.

For your particular case, increasing the kernel parameter maxfiles to 2048 (this is the maximum), should make the command ulimit -n 1025 work.


Hope this helps,
Rik

[U.SivaKumar_2]

Hi,
A hard limit had been imposed in the system globally by the kernel paramter maxssiz which
defines the maximum stack size. That is the one which prevents you do that ulimit task.

regards,
U.Sivakumar