ulimit configuration for users

[Alex Almaraz]

Someone could tellme how can I set the ulimit parametes permanently and dinamically?

HP-UX B.11.00 U 9000/800

output:
#ulimit
4194303
#ulimit -a
ksh: ulimit: bad option(s)

# /usr/bin/ulimit -a

time(seconds) unlimited
file(blocks) unlimited
data(kbytes) 262144
stack(kbytes) 8192
memory(kbytes) unlimited
coredump(blocks) 4194303
nofiles(descriptors) 2048

I need to change the (data, stack and nofiles)parameters.

Someone knows if the change applies for all the users? e.g. oracle? What do I need to do?

Hoping your response.
Best regards

[RAC_1]

The changes won't apply to all users.
Applies to user you logged in as. Also you can not set it more than what kernel says. (e.g. maxdsiz, maxssiz and maxtsiz)

Anil

[Devender Khatana]

Hi,

Also the nofiles(descriptors) parameter depends on nfile kernel parameter. You would require to increase that if you want to increase this.

HTH,
Devender

[Joel Girot]

Hi,
maybe this can help you ?
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=266187
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=233595
Joel

[Binu_2]

Hi
Check these links
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=643220
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=266187

Thanks
Binu

[Tim Sanko]

Being lazy, I would set it in the users .profile. To set groups I would dot in
(. /xxx/limits) to common sets of limits.

Then again, there may be better ways, but none easier.

Tim

[Bill Hassell · Accepted solution]

First, ulimit -a does not work at all with ksh unless you are up to date on patches. /usr/bin/ulimit is not a command (executable), it is a script that invokes the HP POSIX shell. The Korn shell is also a POSIX shell but it is not as full-featured as the HP shell. NOTE: /usr/bin/sh is not the Bourne shell.

To make the same changes to all user, simply put the ulimit value in /etc/profile since all shell users (except csh which is very non-standard) will go through /etc/profile. NOTE: patch ksh or switch everyone to use the standard HP POSIX shell.

Now, the data and stack values shown above look very much like the default kernel parameters and you cannot increase either of these beyond the kernel limits. If you need the data area to be 1500megs, change the maxdsiz and maxdsiz_64 kernel parameters. ulimit will default to those values. Note: maxdsiz_64 should always be larger than maxdsiz. maxdsiz is only for 32 bit programs.

Now if you have problem users that may use up too much memory, you can adjust ulimit -d for specific users by testing in /etc/profile. Normally, you never need to change the stack size, especially for Oracle and related programs.

[Alex Almaraz]

Joel,

The link you gave me I think applies for Tru64 only. But thanks.

Thanks all for the responses you gave me, they helped me in great manner.

I find I can change the values by using the sam also, and is a good idea to configure it in /etc/profile for all users. Thanks Bill for clarify me some doubts.

Thanks again

[Alex Almaraz]

Considering tha responses of all users, the problem has been solved by setting the values required. Thanks for the links Bino.


Best regards