Re: too many open files and over 1K xinetd running

["Dieter Kluenter" <dieter@dkluenter.de>]

"Seger, Mark" <mark.seger@hp.com> writes:

> I’m using xinetd forwarding to allow a number of compute nodes that don’t have
> a direct path to our ldap server to get forward on by a host that does.  When
> running a highly parallel job that starts over 1K instances at the same time,
> I see all these xinetd instances also start up on my forwarding server and in
> fact they don’t seem to go away, at not any time soon.  Meanwhile back on my
> ldap server I see  number of ‘too many open files’ errors in /var/log/messages
> and if I try to “su user” on one of the nodes I’ll see it hang for awhile.  I
> have bumped the number of open files very high on the ldap server and in fact:
>
> [root@aicgateway ~]# cat /proc/sys/fs/file-nr
>
> 5610    0       201116
>
> So out of a pool of 200K we’re only using 5K.
>
> Anyhow, I’m wondering if there are any special tricks to configuring the
> environment to handling this type of load on ldap OR should it be able to
> handle it the way I’m currently configured?  Any special tuning hints?  Any
> more info I can supply?

ulimit -n, ulimit -Sn, ulimit -Hn

-Dieter

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Dieter Klünter | Systemberatung
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