Thanks for the replies. Looking through nagios.cfg it seems that Nagios is logging ALL passive checks. Will setting this value to 0 still allow us to get meaningful availability reports? Thanks, Paul <div class="gmail_quote">2009/5/15 Marc Powell <<a href="mailto:marc@ena.com">marc@ena.com</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div class="im"> On May 15, 2009, at 4:46 AM, Paul Corcoran wrote: > Hi, > > I've recently completed a distributed installation of Nagios > consisting of a master server acting as the web front end for Nagios > and 2 slave servers that do all the service checking. > > Currently we are monitoring approx 500 hosts and perform approx 3300 > service checks. > > Nagios performs daily rotation of the logs and they are approx 250MB > in size for each 24 hours period. </div>What in the world are you logging and how volatile is your network? 8500+ services here -- 1.7M nagios-05-10-2009-00.log 1.9M nagios-05-11-2009-00.log 1.9M nagios-05-12-2009-00.log 2.3M nagios-05-13-2009-00.log 2.2M nagios-05-14-2009-00.log 5.6M nagios-05-15-2009-00.log Seems to me that you need to tune down your logging settings... [nagios@noctools etc]$ grep log_ nagios.cfg log_file=/usr/local/nagios/var/nagios.log log_rotation_method=d log_archive_path=/usr/local/nagios/var/archives 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 -- Marc <div><div></div><div class="h5"> ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. <a href="http://p.sf.net/sfu/businessobjects" target="_blank">http://p.sf.net/sfu/businessobjects</a> _______________________________________________ Nagios-users mailing list <a href="mailto:Nagios-users@lists.sourceforge.net">Nagios-users@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/nagios-users" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagios-users</a> ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null </div></div></blockquote></div>