How often does Nagios need restarting? (Quis custodiet ipsos custodes?)

[Kustner, Tom]

I am a Nagios user, not the administrator.  We are running Nagios 2.9 on
RHEL 4 or 5.  Overall, 200+ hosts with 3000 services being monitored. I
have access for monitoring a smaller number of hosts.

In another posting, I alluded to an issue where a host had gone down but
no alert was sent out.   The issue surfaced again today and as was done
the other time, Nagios was restarted to "fix" the problem.   I am
naturally concerned about the unreliability.  

Any thoughts on this problem?    Specifically:

* What are best practices for making sure Nagios does not fall down on
the job?   Is there something not set right?

* Are other Nagios administrators restarting Nagios on a weekly or
nightly basis to keep it on the job?

* Is this an issue specific to Nagios 2.9?  Was 2.9 a spotty version?

* For a given host, why would "active checks" be enabled, yet "N/A"
appears in the "Next Active Check" field?

Thanks for any help.

-Tom Kustner-


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