nsca daemon performance

[Ford, Andy]

Thanks, Noel, that's very good advice for an xinetd-propelled nsca daemon, but this setup is using a standalone nsca.
I used the xinetd approach for many years, maybe I should switch back...

From: Noel Platzke [mailto:neufpas at gmail.com]
Sent: Tuesday, May 04, 2010 2:51 PM
To: Nagios Users List
Subject: Re: [Nagios-users] nsca daemon performance

If you're running the nsca daemon in xinetd you can up the number of threads and connections. I had a similar issue as I started adding services and eventually fixed it by adding these lines to /etc/xinetd.d/nsca

        instances       = UNLIMITED
        per_source      = UNLIMITED
        cps             = 5000 0


On Tue, May 4, 2010 at 2:53 PM, Ford, Andy <andrew.ford at wachovia.com<mailto:andrew.ford at wachovia.com>> wrote:
I'm having a problem with my nsca daemon (v. 2.7.2) in a distributed monitoring setup (nagios 3.2.1 on SLES 10.2) and I was wondering if anyone else has seen something like this.
nsca seems to be dropping incoming passives in an inconsistent way, sometimes keeping up, other times seeming to skip 1,2, or even sometimes 3 incoming passive checks.
I've checked the collector, and it seems to be sending the nsca packets very solidly on the 5 minute normal_check_interval.

These are the times that nagios logged a "PASSIVE SERVICE CHECK" for a typical service on a single host since last midnight:

00:03:55
00:08:56
00:13:50
00:18:51
00:28:53
00:38:55
00:43:56
00:48:50
00:53:51
00:58:52
01:08:54
01:13:55
01:18:49
01:23:50
01:38:53
01:43:54
01:48:55
01:53:49
01:58:50
02:18:54
02:23:55
02:28:49
02:33:50
02:53:47
02:58:55
03:03:56
03:08:50
03:23:46
03:28:54
03:33:55
03:38:56
03:43:50
03:48:51
03:58:46
04:03:54
04:08:55
04:13:56
04:18:50
04:38:54
04:43:55
04:48:56
04:53:50
04:58:51
05:03:52
05:13:54
05:18:55
05:23:56
05:28:50
05:48:54
05:53:55
05:58:49
06:03:50
06:23:54
06:28:48
06:33:49
06:38:50
07:03:55
07:08:49
07:13:50
07:33:54
07:38:55
07:43:56
07:48:50
08:03:46
08:08:54
08:13:55
08:18:49
08:23:50
08:33:52
08:43:54
08:48:55
08:53:56
08:58:50
09:08:45
09:18:54
09:23:55
09:28:49
09:33:50
09:38:44
09:53:54
09:58:55
10:03:49
10:08:50
10:28:54
10:33:55
10:38:49
10:43:50
11:08:55
11:13:56
11:18:50
11:33:46
11:38:54
11:43:55
11:48:56
11:53:50
12:13:54
12:18:55

Andy Ford
Network Security Compliance & Automation, Wells Fargo & Co.
314-600-7025
andrew.ford at wachovia.com<mailto:andrew.ford at wachovia.com>


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