Overloaded master

[Martin Melin]

What kind of notifications are you doing and how many are you sending out?
Why does a notification cycle take 9 seconds to complete?

On Sat, Jan 23, 2010 at 12:13 AM, Mike Lindsey <mike-nagios at 5dninja.net>wrote:

> What kind of options does one have, if your master nagios server is
> getting overloaded?
>
> I have half a dozen slaves doing polling, submitting passive check
> results back via send_nsca.  The master does no active polling, just
> event processing, notifications, and web ui.
>
> Under normal circumstances, it works alright.  But after a restart it
> can take up to half an hour before the master catches up; and if there
> are a lot of events, the act of sending out notifications can cause it
> to fall behind.
>
> I'm pre-caching my object file, I'm skipping circular dependency checks,
> and I've gotten a notification cycle down to 9 seconds.  I tried
> modifying nagios to fork before notifications, but that failed pretty
> spectacularly; so that 9 seconds is a time where 900 or so passive check
> submissions block until the notifications are done.
>
> Are there any options for running a dual-master setup, or other ways to
> spread the load across multiple machines?
>
> Has anyone patched nsca to submit check results into the checkresults
> directory, instead of via the nagios.cmd pipe?  What kind of improvement
> can one expect from that?
>
> Any other advice?
>
> --
> Mike Lindsey
>
>
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-- 
Martin Melin
____________________________
op5 AB
http://www.op5.com

http://www.op5.org/
http://www.op5.com/op5/products/network-monitor/nagios/
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Throughout its 18-year history, RSA Conference consistently attracts the
world's best and brightest in the field, creating opportunities for Conference
attendees to learn about information security's most important issues through
interactions with peers, luminaries and emerging and established companies.
http://p.sf.net/sfu/rsaconf-dev2dev
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