Re: Suspect daily,weekly cron causing hangs
I suspect the same here, although I'm a newbie (one
year on this one box). cron/spawned processes seem to
precede virtual console login screen and afterstep ugliness
here each morning. ...a mis-malloc or two, maybe?
hamm is running on this box.
Art
On Sun, Jul 26, 1998 at 12:03:18PM -0400, Martin Weinberg wrote:
>
> Folks,
>
> I have a Beowulf-type Debian-based cluster of 16 dual
> PII 333Mhz boxes (Asus P2L97-DS) Debian 1.3.1.
>
> They run hard, often under full load with high network
> traffic for days or not weeks. The current application
> is an MPI application using a master-slave paradigm.
>
> I've noticed that the "master" machine often hangs just
> after daily or weekly crons. In fact, 6:48 or a bit later
> is a very popular hang time. Hangs on Sunday are the most
> popular (much to my chagrin!). The fact that the master
> hangs preferentially correlates with high network traffic.
> At first, I disabled (dpkg -r) xntp3 which seemed to be
> an obvious culprit but I'm still getting occasional hangs.
>
> Any thoughts? I suppose I could just disable these
> crons altogether but I'd like to see if any of you have
> run across this sort of problem first.
>
> --M
>
> ===========================================================================
>
> Martin Weinberg Phone: (413) 545-3821
> Dept. of Physics and Astronomy FAX: (413) 545-2117/0648
> 530 Graduate Research Tower
> University of Massachusetts
> Amherst, MA 01003-4525
>
>
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