RE: Ulimit command only works after su

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OK I finally got back to this and no matter what I put in the limits.conf, I
still must su to the same user that I log in as in order to change the
ulimit parms.  It's really not making any sense.

[sybase@fsh1166db01 sybase]$ whoami
sybase
[sybase@fsh1166db01 sybase]$ ulimit -n 
1024
[sybase@fsh1166db01 sybase]$ ulimit -n 4090
-bash: ulimit: open files: cannot modify limit: Operation not permitted
[sybase@fsh1166db01 sybase]$ su - sybase
Password: 
[sybase@fsh1166db01 sybase]$ ulimit -n
1024
[sybase@fsh1166db01 sybase]$ ulimit -n 4090 
[sybase@fsh1166db01 sybase]$ ulimit -n
4090
[sybase@fsh1166db01 sybase]$ 

Regards, Marshall

-----Original Message-----
From: Joe Hood [mailto:joe.hood@xxxxxxxxx] 
Sent: Monday, May 09, 2005 12:15 PM
To: General Red Hat Linux discussion list
Subject: Re: Ulimit command only works after su


@dba hard nofile 65535
@dba hard nproc 16384
@oaa hard nofile 65535
@oaa hard nproc 16384

is how Oracle recommends (with groups instead of users), I'm sure
Sybase is similar.

Also, you have "Sybase" as a user with a capital first letter.

On 5/9/05, McDougall, Marshall (FSH) <MarMcDouga@xxxxxxxxx> wrote:
> RH ES2.1,  2.4.21-15.ELsmp
> 
> I am trying to give our DBA the ability to test his Sybase installation
with
> various parm changes, one of which is "ulimit -n".  I have added:
> 
> Sybase       soft    nofile  3072
> Sybase       hard    nofile  4096
> 
> to the /etc/security/limits.conf file and that sort of works.  I say sort
of
> because if I log in as Sybase and execute ulimit -n 2048 I get:
> 
> [sybase@fsh1166db02 sybase]$ ulimit -n
> 1024
> [sybase@fsh1166db02 sybase]$ ulimit -n 2048
> -bash: ulimit: open files: cannot modify limit: Operation not permitted
> 
> Then if I "su - sybase" and do it again, it works:
> 
> [sybase@fsh1166db02 sybase]$ su - sybase
> Password:
> [sybase@fsh1166db02 sybase]$ ulimit -n 2048
> [sybase@fsh1166db02 sybase]$ ulimit -n
> 2048
> 
> It's not making a lot of sense to me.  Any enlightenment appreciated.
> 
> Regards, Marshall
> 
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