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Nagios, 2nd Edition by Wolfgang Barth

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F.2 Measures for Improving Performance

If performance is subjectively poor and the latency of the service check lies permanently in the red zone, then you need to act. But where do you start? Trying things out is preferable to studying the problem, and there are no patent recipes. Normally you will lose sight of the overall picture very quickly if you try making small adjustments here and there. You should therefore always change just one parameter at a time and give Nagios time to adjust to the new state of affairs. Depending on the system, the number of checks to be performed in the five-minute average, and other indicators, sometimes a few minutes is enough to notice changes using nagiostats or MRTG, but at other times even half an hour may ...

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