Dear List , I am getting frequent Nagios screen issue. The checks are not updating properly . Below is my nagios.cfg file with nagiostats. Please let me know is there anywhere I can fine tune the Nagios. I am using a Xeon 2.0 GH X 2 , 4 GB RAM , . log_file=/usr/local/nagios/var/nagios.log cfg_file=/usr/local/nagios/etc/objects/commands.cfg cfg_file=/usr/local/nagios/etc/objects/contacts.cfg cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg cfg_file=/usr/local/nagios/etc/objects/contactgroups.cfg cfg_file=/usr/local/nagios/etc/objects/dependencies.cfg cfg_file=/usr/local/nagios/etc/objects/escalations.cfg cfg_file=/usr/local/nagios/etc/objects/hosts.cfg cfg_file=/usr/local/nagios/etc/objects/hostgroups.cfg cfg_file=/usr/local/nagios/etc/objects/services.cfg cfg_file=/usr/local/nagios/etc/objects/servicegroups.cfg object_cache_file=/usr/local/nagios/var/objects.cache precached_object_file=/usr/local/nagios/var/objects.precache resource_file=/usr/local/nagios/etc/resource.cfg status_file=/usr/local/nagios/var/status.dat aggregate_status_updates=0 status_update_interval=10 nagios_user=nagios nagios_group=nagios check_external_commands=1 command_check_interval=-1 command_file=/usr/local/nagios/var/rw/nagios.cmd external_command_buffer_slots=4096 lock_file=/usr/local/nagios/var/nagios.lock temp_file=/usr/local/nagios/var/nagios.tmp temp_path=/tmp event_broker_options=-1 log_rotation_method=d log_archive_path=/usr/local/nagios/var/archives use_syslog=1 log_notifications=1 log_service_retries=1 log_host_retries=1 log_event_handlers=1 log_initial_states=1 log_external_commands=1 log_passive_checks=1 service_inter_check_delay_method=s max_service_check_spread=30 service_interleave_factor=s host_inter_check_delay_method=s max_host_check_spread=30 max_concurrent_checks=0 check_result_reaper_frequency=5 max_check_result_reaper_time=20 check_result_path=/usr/local/nagios/var/spool/checkresults max_check_result_file_age=3600 cached_host_check_horizon=15 cached_service_check_horizon=15 enable_predictive_host_dependency_checks=1 enable_predictive_service_dependency_checks=1 soft_state_dependencies=0 auto_reschedule_checks=0 auto_rescheduling_interval=30 auto_rescheduling_window=180 sleep_time=0.25 service_check_timeout=120 host_check_timeout=30 event_handler_timeout=30 notification_timeout=30 ocsp_timeout=5 perfdata_timeout=5 retain_state_information=1 state_retention_file=/usr/local/nagios/var/retention.dat retention_update_interval=60 use_retained_program_state=1 use_retained_scheduling_info=1 retained_host_attribute_mask=0 retained_service_attribute_mask=0 retained_process_host_attribute_mask=0 retained_process_service_attribute_mask=0 retained_contact_host_attribute_mask=0 retained_contact_service_attribute_mask=0 interval_length=60 use_aggressive_host_checking=0 execute_service_checks=1 accept_passive_service_checks=1 execute_host_checks=1 accept_passive_host_checks=1 enable_notifications=1 enable_event_handlers=1 process_performance_data=0 obsess_over_services=0 obsess_over_hosts=0 translate_passive_host_checks=0 passive_host_checks_are_soft=0 check_for_orphaned_services=1 check_for_orphaned_hosts=1 check_service_freshness=1 service_freshness_check_interval=60 check_host_freshness=0 host_freshness_check_interval=60 additional_freshness_latency=15 enable_flap_detection=1 low_service_flap_threshold=5.0 high_service_flap_threshold=20.0 low_host_flap_threshold=5.0 high_host_flap_threshold=20.0 date_format=us p1_file=/usr/local/nagios/bin/<a href="http://p1.pl">p1.pl</a> enable_embedded_perl=1 use_embedded_perl_implicitly=1 illegal_object_name_chars=`~!$%^*|'"<>?,()= illegal_macro_output_chars=`~$&|'"<> use_regexp_matching=0 use_true_regexp_matching=0 daemon_dumps_core=0 use_large_installation_tweaks=0 enable_environment_macros=1 debug_level=2 debug_verbosity=2 debug_file=/usr/local/nagios/var/nagios.debug max_debug_file_size=1000000 broker_module=/usr/local/lib/mk-livestatus/livestatus.o /usr/local/nagios/var/rw/live event_broker_options=-1 ----------------------------------------------------------------------------------------------------------------------------------- CURRENT STATUS DATA ------------------------------------------------------ Status File: /usr/local/nagios/var/status.dat Status File Age: 0d 0h 0m 4s Status File Version: 3.0.3 Program Running Time: 0d 0h 10m 55s Nagios PID: 21581 Used/High/Total Command Buffers: 0 / 0 / 4096 Total Services: 6747 Services Checked: 6747 Services Scheduled: 6747 Services Actively Checked: 6747 Services Passively Checked: 0 Total Service State Change: 0.000 / 41.580 / 0.077 % Active Service Latency: 0.090 / 351.086 / 191.014 sec Active Service Execution Time: 0.013 / 60.096 / 0.472 sec Active Service State Change: 0.000 / 41.580 / 0.077 % Active Services Last 1/5/15/60 min: 365 / 1365 / 1747 / 5490 Passive Service Latency: 0.000 / 0.000 / 0.000 sec Passive Service State Change: 0.000 / 0.000 / 0.000 % Passive Services Last 1/5/15/60 min: 0 / 0 / 0 / 0 Services Ok/Warn/Unk/Crit: 6539 / 82 / 13 / 113 Services Flapping: 4 Services In Downtime: 0 Total Hosts: 1925 Hosts Checked: 1925 Hosts Scheduled: 1925 Hosts Actively Checked: 1925 Host Passively Checked: 0 Total Host State Change: 0.000 / 23.550 / 5.055 % Active Host Latency: 0.000 / 124.702 / 111.270 sec Active Host Execution Time: 0.014 / 4.335 / 0.089 sec Active Host State Change: 0.000 / 23.550 / 5.055 % Active Hosts Last 1/5/15/60 min: 521 / 1925 / 1925 / 1925 Passive Host Latency: 0.000 / 0.000 / 0.000 sec Passive Host State Change: 0.000 / 0.000 / 0.000 % Passive Hosts Last 1/5/15/60 min: 0 / 0 / 0 / 0 Hosts Up/Down/Unreach: 1907 / 18 / 0 Hosts Flapping: 8 Hosts In Downtime: 0 Active Host Checks Last 1/5/15 min: 633 / 3345 / 9068 Scheduled: 625 / 3297 / 8997 On-demand: 8 / 48 / 71 Parallel: 625 / 3303 / 9007 Serial: 0 / 0 / 0 Cached: 8 / 43 / 61 Passive Host Checks Last 1/5/15 min: 0 / 0 / 0 Active Service Checks Last 1/5/15 min: 421 / 1948 / 2452 Scheduled: 421 / 1948 / 2452 On-demand: 0 / 0 / 0 Cached: 0 / 0 / 0 Passive Service Checks Last 1/5/15 min: 0 / 0 / 0 External Commands Last 1/5/15 min: 0 / 0 / 0 Thanks & Regards, dE