Setting Nagios host check frequency and Nagios default check interval

With nagios (nagios3), the normal check interval is set to 5 minutes, and the retry is set to 1 minute. If your services are not that critical, you can increase the default check interval, perhaps from five minutes (or 600 seconds) to something like 10 minutes or 15 minutes.

Look for a file like generic-service_nagios.cfg in your configuration directory, possibly:

/etc/nagios3/conf.d/generic-service_nagios2.cfg

Then you can find the corresponding lines to make the edits you need:

define service{                                         
        name                            generic-service 
        active_checks_enabled           1               
        passive_checks_enabled          1               
        parallelize_check               1               
        obsess_over_service             1               
        check_freshness                 0               
        notifications_enabled           1               
        event_handler_enabled           1               
        flap_detection_enabled          1               
        failure_prediction_enabled      1               
        process_perf_data               1               
        retain_status_information       1               
        retain_nonstatus_information    1               
                notification_interval   0               
                is_volatile             0               
                check_period            24x7            
                normal_check_interval   5              
                retry_check_interval    1               
                max_check_attempts      4               
                notification_period     24x7            
                notification_options    w,u,c,r         
                contact_groups          admins          
        register                        0               
}

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