If you're restarting Nagios through the web interface (rather than on the command line), I think I can help you. My understanding is that restarting Nagios through the web interface is done as an <a href="http://www.nagios.org/developerinfo/externalcommands/commandlist.php">external command</a>. The web interface sends commands to the command_file (set in your nagios.cfg file), but Nagios only checks the command_file periodically. I think the default interval is 15 minutes. Below are the relevant settings I have in my nagios.cfg file, plus a hyperlink I think you may find useful. check_external_commands=1 <a href="http://nagios.sourceforge.net/docs/2_0/configmain.html#command_check_interval">command_check_interval</a>=1 command_file=/var/nagios/rw/nagios.cmd Changing this interval will also affect how quickly other external commands (such as en/disabling notifications) respond to the web interface. <div class="gmail_quote">On Wed, May 7, 2008 at 10:33 AM, Marc Powell <<a href="mailto:marc@ena.com">marc@ena.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> > -----Original Message----- > From: <a href="mailto:nagios-users-bounces@lists.sourceforge.net">nagios-users-bounces@lists.sourceforge.net</a> [mailto:<a href="mailto:nagios-users-">nagios-users-</a> > <a href="mailto:bounces@lists.sourceforge.net">bounces@lists.sourceforge.net</a>] On Behalf Of #ANG CHIN TECK# > Sent: Monday, May 05, 2008 11:05 PM > To: nagios-users > Subject: [Nagios-users] high check latency,slow update of config on web > interface > > Hi all, > > I am currently monitoring 50 hosts with no services, only pinging them. > perf info for these 50 hosts: > check interval: 10 mins > check duration: avg 4 s (5 pings) > but my check latency fluctuates alot (10s , 140s , 250s) > > I am also monitoring 2 other hosts with 10 services. > perf info for these 10 services: > check interval: 1 min > check duration: avg 3s > check latency fluctuates (2s, 5s, 48s) > > Why does the latency fluctuates so much? The version of nagios you are using would be critical information. In nagios 2.x, active host checks are run in serial, not in parallel and are highly discouraged because they introduce significant latencies. In 3.x, they've been made to run in parallel. I'm guessing you're using 2.x. Nagios is primarily a service monitoring application and is designed to monitor services. Host monitoring is typically only done on an as-needed basis. > Another problem is that after i update my config file, verify and restart > nagios, it takes 15 mins for the web interface to register the change. Are you using ndoutils? With that few hosts and services the change should be immediate. Do you see that your objects cache file contains the new information? Do you have multiple nagios daemons running at the same time? > Are the 2 problems linked? Not in any way that I've ever seen. -- Marc ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. <a href="http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone" target="_blank">http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone</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 </blockquote></div>