Issues with Nagios 2.4?

[Michael T. Halligan]

A combination of tweaks seems to have fixed this.  Lowering
service_reaper_frequency combined with turning on smart interleaving seems
to make Nagios quite a bit better at catching problems.

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> Nagios seems to have been very unstable the past couple of weeks. The
> only change I've made is upgrading from 2.2 to 2.4.  It could just be
> that I have
> some bad configuration options, but I'm not sure. I just had a server
> go down for an hour, and Nagios never caught it.  In general, since
> upgrading to 2.0
> Nagios seems very slow on catching broken services/hosts, but usually
> checks them (not always). I look at my status overview right now, and
> Nagios
> says Last Check for almost every service is two days old.  Any ideas
> on what I'm doing wrong?
>
> Here's my Nagios log without comments or blank lines
>
> log_file=/nagios/services/nagios/var/nagios.log
> cfg_file=/nagios/services/nagios/etc/checkcommands.cfg
> cfg_file=/nagios/services/nagios/etc/contact-templates.cfg
> cfg_file=/nagios/services/nagios/etc/contactgroups.cfg
> cfg_file=/nagios/services/nagios/etc/contacts.cfg
> cfg_file=/nagios/services/nagios/etc/escalations.cfg
> cfg_file=/nagios/services/nagios/etc/host-templates.cfg
> cfg_file=/nagios/services/nagios/etc/service-templates.cfg
> cfg_file=/nagios/services/nagios/etc/misccommands.cfg
> cfg_file=/nagios/services/nagios/etc/time_periods.cfg
> cfg_file=/nagios/services/nagios/etc/nagios-commands.cfg
> cfg_file=/nagios/services/nagios/etc/nagios-hostgroups.cfg
> cfg_file=/nagios/services/nagios/etc/nagios-hosts.cfg
> cfg_file=/nagios/services/nagios/etc/nagios-service-templates.cfg
> cfg_file=/nagios/services/nagios/etc/nagios-services.cfg
> object_cache_file=/nagios/services/nagios/var/objects.cache
> resource_file=/nagios/services/nagios/etc/resource.cfg
> temp_file=/nagios/services/nagios/var/nagios.tmp
> status_file=/nagios/services/nagios/var/status.dat
> aggregate_status_updates=1
> status_update_interval=15
> nagios_user=nagios
> nagios_group=nagios
> enable_notifications=1
> execute_service_checks=1
> accept_passive_service_checks=0
> execute_host_checks=1
> accept_passive_host_checks=0
> enable_event_handlers=1
> log_rotation_method=d
> log_archive_path=/nagios/services/nagios/var/archives
> check_external_commands=1
> command_check_interval=60s
> command_file=/nagios/services/nagios/var/rw/nagios.cmd
> downtime_file=/nagios/services/nagios/var/downtime.dat
> comment_file=/nagios/services/nagios/var/comments.dat
> lock_file=/nagios/services/nagios/var/nagios.lock
> retain_state_information=1
> state_retention_file=/nagios/services/nagios/var/retention.dat
> use_retained_scheduling_info=1
> retention_update_interval=0
> use_retained_program_state=1
> use_syslog=1
> log_notifications=1
> log_service_retries=1
> log_host_retries=1
> log_event_handlers=1
> log_initial_states=0
> log_external_commands=1
> log_passive_checks=0
> sleep_time=0.25
> service_inter_check_delay_method=n
> max_service_check_spread=5
> service_interleave_factor=s
> max_concurrent_checks=300
> service_reaper_frequency=40
> host_inter_check_delay_method=n
> max_host_check_spread=5
> interval_length=60
> auto_reschedule_checks=0
> auto_rescheduling_interval=30
> auto_rescheduling_window=30
> use_agressive_host_checking=0
> enable_flap_detection=0
> low_service_flap_threshold=5.0
> high_service_flap_threshold=20.0
> low_host_flap_threshold=5.0
> high_host_flap_threshold=20.0
> soft_state_dependencies=0
> service_check_timeout=60
> host_check_timeout=30
> event_handler_timeout=30
> notification_timeout=30
> ocsp_timeout=5
> perfdata_timeout=5
> obsess_over_services=0
> process_performance_data=0
> check_for_orphaned_services=0
> check_service_freshness=0
> freshness_check_interval=60
> check_host_freshness=0
> host_freshness_check_interval=60
> date_format=us
> illegal_object_name_chars=`~!$%^&*|'"<>?,()'=
> illegal_macro_output_chars=`~$&|'"<>
> use_regexp_matching=0
> use_true_regexp_matching=0
> admin_email=support at nagios.com
> admin_pager=ops_urgent at nagios.com
>
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