increasing ulimit -n

[Shawn Badger]

I have my ulimt -n set for Websphere to 8000

On 3/2/07, David <daz at damnetwork.net> wrote:
>
> On Fri, 2 Mar 2007, Alex Dean wrote:
>
> > I've been reading about how it's possible to raise this limit by setting
> > 'ulimit -n' to some higher number.  It's currently at 1024.  The only
> > thing this machine does is MySQL, so there are no concerns about other
> > users, etc.  Before I make any changes, though, I was hoping someone
> > might help me figure out a reasonable way to increase this number.
> >This
> > is new territory, so I'm wanting to tread cautiously.
>
> generally you can set the limits on a per-user basis, which is better
> anyway.
>
> Not sure about other distros, but for redhat, put the changes in
> /etc/security/limits.conf
> i.e.:
> mysqluser          soft    nproc           2047
> mysqluser          hard    nproc           32768
> mysqluser          soft    nofile          4096
> mysqluser          hard    nofile          524288
> mysqluser          hard    stack           65536
> mysqluser          hard    memlock         3145728
>
> Then, in the users .profile (or equivilant)
> ulimit -u 32768 -n 524288 -l 3145728 -s 65536
>
> One thing to be aware of, from the bash manpage:
> A hard limit cannot be  increased  once it  is set; a soft limit may be
> increased up to the value of the hard limit.
>
> This is what I use for my oracle servers, anyway.
> David
>
> --
> "I find your lack of faith disturbing."
> --Darth Vader
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