NSCA in Daemon Mode, response time grows up

[Erwin.Mascardo at intelsat.com]

>-----Original Message-----
>From: ckleinfeld2 at gmx.ch [mailto:ckleinfeld2 at gmx.ch] 
>Sent: Saturday, 21 May, 2005 02:12
>To: nagios-users at lists.sourceforge.net
>Subject: [Nagios-users] NSCA in Daemon Mode, response time grows up
>
>
>Hello List
>
>I'm using NSCA-cvs with Nagios 2.0b3 in a large Network Enviroment.
>
>We have only one Nagios Server for 427 Hosts (291 active, 136 
>passive) with
>2198 Services (399 active, 1799 passive).
>
>If every passive Host send the full-Service checks Results, 
>every full hour,
>the Response-Time time from NSCA grows up to 5-10 seconds or higher.
>
>The result of this is that some Hosts are running in a 10 
>second timeout and
>giving up to send the check-results.
>
>What can i do to improve the response Time from NSCA ?
>
>Currently NSCA is running in Daemon, maybe it improves speed 
>if i'm starting
>it with a tcp-wrapper, like xinetd - or it slows down things more?
>Is the time come to thing about a distrubuted Nagios Setup?
>
>The Hardware is a DL380G3 2xIntel Xeon 3.2GHZ Proccesors. 
>Nagios is under a
>ext3 Filesystem, which is mirrored to a redundant System using DRBD and
>Heartbeat.
>
>I dont know what i can do at the moment to solve situation, 
>any help would
>be great.
>
>Regards
>Chris

My own setup is similar down to the hardware, although the proportions of
active and passive checks are reversed. (And I'm running 1.2, so no passive
host checks.) From the way you're asking the question, though, it seems like
all of your passive checks run at approximately the same time, and that will
bottleneck any setup. Try spreading out the checks over a span of several
minutes -- for example, Hostgroup A sends at :00 minutes past the hour,
Hostgroup B at :05, Hostgroup C at :10, and so on. If you're thinking at all
about going to xinetd, this will be absolutely essential.

--Erwin

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