Re: setting ulimits

Hi,

On Apr 12, 2005 10:49 AM, J. Dex <cemail_219_at_hotmail.com> wrote:
> When running the pre-install check for Oracle10g on RHEL 3.4, it is telling
> me that ulimits is not set. However, I set up the appropriate information
> in /etc/security/limits as specified by the install guide. Does ulimits
> also need to be set somewhere else and what does it need to say?
>
> Thanks.

There are a few different ways to address this problem. It used to be called an RHEL bug, but not any more. The approach I use now is derived from the lastest info on Bugzilla and elsewhere. Change two files:

• ## OS parameters vi /etc/init.d/sshd {after variable declaration, e.g. prog="sshd", add following...} ulimit -n 65536 ulimit -u 16384 ulimit -s 32768
• ## OS parameters vi /etc/security/limits.conf * soft nproc 16384 * hard nproc 16384 * soft nofile 65536 * hard nofile 65536 * hard stack 32768 * soft stack 32768

I believe this does not agree with many 'Oracle' flavored install documents. Rather than one being right or wrong, there are many ways to solve the same problem. The solution you see above is to give *everyone* a big default value in 'sshd' file, and then restrict individual users with 'limits.conf'. If you notice my

'limits.conf' does not mention individual users, e.g. oracle soft
nproc 16384, so the 'limits.conf' is unrestricted, e.g. *. You may
want to modify your limits.conf to restrict per user.

The alternative to the above approach causes numerous other problems. Some where there is no valid hack, so I have long ago decided on the above approach.

HTH Regards,

Mike Thomas

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