[Freeipa-users] clients very slow
Dmitri Pal
dpal at redhat.com
Thu Sep 13 22:49:43 UTC 2012
On 09/13/2012 09:54 AM, David Fitzgerald wrote:
>
> Hello Everyone,
>
>
>
> I work at a small university and I deployed freeIPA on my Linux
> network over the summer break with no (known) problems, and
> everything worked as expected. However, now that the semester has
> started and the Linux system is under a much higher load, I am
> noticing that my client machines will randomly slow to a crawl. For
> example, I have a lab of 25 machines. The students can log in ok, but
> after a time, a few of the machines will freeze so that the users on
> those machines cannot do anything. After a few minutes, the frozen
> machines will unfreeze, but other machines will freeze up. I can't
> see any pattern to what machines freeze up. I did not have this
> problem when running NIS, so I suspect it is something in freeIPA but
> I am not sure what to look for to solve the problem. Probably a
> setting somewhere needs tweaked but I don't know. The server and
> clients all run Scientific Linux 6.2.
>
>
>
> Can anyone help me troubleshoot this?
>
Do you use SSSD as a client or something else?
If SSSD we would need the nsswitch, pam, krb5.conf, sssd.conf
configuration files and SSSD logs set to debug_level=8 or 9.
What operation they are freezing on? Is it login/authentication or just
suddenly, which probably indicates identity lookup.
So freezes might be related to the DNS or name resolution lookups that
those machines do. They might be accessing a DNS server that is down or
misconfigured before failing over to a correct one.
So resolve.conf, /etc/hosts would be helpful.
But you might need to check the DNS configuration yourself.
HTH
>
>
>
> Thanks!
>
>
>
> Dave
>
>
>
> +++++++++++++++++++++++
>
> David Fitzgerald
>
> Department of Earth Sciences
>
> Millersville University
>
> Millersville, PA 17551
>
>
>
> Phone: 717-871-2394
>
>
>
>
>
> _______________________________________________
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> Freeipa-users at redhat.com
> https://www.redhat.com/mailman/listinfo/freeipa-users
--
Thank you,
Dmitri Pal
Sr. Engineering Manager for IdM portfolio
Red Hat Inc.
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