FW: Problems with distributed setup, master overload?

Tyler Lund tlund at hostedsolutions.com
Tue Jun 26 17:02:17 CEST 2007


Marc Powell wrote:
> FWIW, I have a fairly large passive-only install with just over 4000
> passive checks every 5 minutes. I haven't experienced this problem. It's
> a pretty simple, standard install but one difference is I don't perform
> any host checks. Perhaps you have host checks that are not optimized or
> completing in a timely manner and are holding up processing of other
> tasks. Nagios will stop all other processing during host checks until
> they complete.
>
> --
> Marc
Marc,

Thanks for that little bit of info... I didn't realize Nagios behaved 
this way. I played around with timing out host checks quickly, and even 
turning them off globally to see if this made any difference, but I 
still end up in situations where nagios just stops reading the command 
fifo.

I think I may have narrowed it down to the even broker and ndo2db. I'm 
running the ndo module and logging service info to a mysql database for 
integration with other internal applications. Nagios seems to be getting 
hung up talking to ndomod when the mysql database gets somewhat large 
(>3 Gigs) . If I disable the ndo2db module or just truncate the tables 
everything seems fine. I've been fine tuning the event broker and the 
ndo2db config to try to keep the database as small as I can, but I think 
the root cause of my problem is nagios getting busy dumping event broker 
data and not getting around to reading that fifo.


Thanks,
-Tyler

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