Nagios Support Forum

On the advice of an individual that was experiencing the same issues as I was, I disabled the embedded Perl interpreter (set 'enable_embedded_perl=0' in nagios.cfg). Restarted Nagios and waited. It's now been 5+ days since doing this and service and host latencies are stable in the 200 and 400 mS ra...

Hi abrist, Thanks for the link. The link you provided appears to be for Nagios 4.x and differs slightly from Nagios 3.x. I'm including both here to avoid any confusion. Nagios 3.x large installation tweaks: http://nagios.sourceforge.net/docs/3_0/largeinstalltweaks.html Nagios 4.x large installation ...

Before submitting a case w/ the devs regarding the use_large_installation_tweaks and child_processes_fork_twice tunables, I needed to verify that the problem existed in 3.5.1 (I had been using 3.3.1). Sure enough, I can reproduce the problem with 3.5.1. Next, I went reading in the source code to see...

Reading up on what large_installation_tweaks does, ( http://nagios.sourceforge.net/docs/3_0/largeinstalltweaks.html ), I interpreted that if set, child_processes_fork_twice would be automatically set to 0. This seemed to be reinforced in the docs for "child_process_fork_twice" as it stated...

Over the new year's break, I configured a simple Nagios setup consisting of ~650 host checks each with a simple nrpe service check. Without the need for SNMP checks, I also set 'enable_environment_macros=0' since that was brought up in an earlier post I warranted some investigation. After ~38.5 hour...

I have a few different core systems running 3.5.1 and I have not noticed this behavior. The checks/5min are low on those servers though (around a 1000). This behavior in the past has been caused by: 1) Latency/lack of resources (ram/disk io/load) 2) System ulimits (open files is usually the culprit...

It turns out that a fresh generic OS build behaves the same as one w/ Gluster and Linux HA (heartbeat) installed. After ~33 hours of daemon uptime, both service and host latencies increase at a rate of approx 160 seconds / day. Also, kernel time behaves similarly in that it gradually rises and when ...

The shutdown and rebuild of the 2nd node looks to have had an interesting effect on the service latencies of the 1st node. The service latency times due to the daemon restart at 9:42 AM yesterday is not surprising. However, when I shutdown the 2nd node at 13:39 PM yesterday to begin rebuilding the O...

Do you know if this kernel was a release candidate, or a full release? Which one are you running - 2.6.18 or 2.6.32? Was the kernel upgraded or any other major changes done before you started experiencing the issue? Hi abrist, AFAIK, these kernels are the full release. They are the ones released th...

Hi slansing, Very interesting data sets, I hope your above proposal is not going to be too much work, are you running anything else on the same kernel configuration as this nagios server? You had mentioned HA, is there a backup server you could bring online to see if it has the same quirky latency? ...