I have a quad core 2GHZ and 4 GB memory machine and I am getting the following performance. <table border="0" cellspacing="4"><tbody><tr><td class="perfItem" align="left" valign="center"><a href="https://nagios.cc.columbia.edu/nagios/cgi-bin/extinfo.cgi?type=4" class="perfItem">Service Check Execution Time:</a></td> <td class="perfValue" nowrap valign="top"><a href="https://nagios.cc.columbia.edu/nagios/cgi-bin/extinfo.cgi?type=4" class="perfValue">0.00 / 60.01 / 0.381 sec</a></td> </tr> <tr> <td class="perfItem" align="left" valign="center"><a href="https://nagios.cc.columbia.edu/nagios/cgi-bin/extinfo.cgi?type=4" class="perfItem">Service Check Latency:</a></td><td class="perfValue" nowrap valign="top"><a href="https://nagios.cc.columbia.edu/nagios/cgi-bin/extinfo.cgi?type=4" class="perfValue">0.00 / 15.93 / 0.156 sec</a></td> </tr> <tr> <td class="perfItem" align="left" valign="center"><a href="https://nagios.cc.columbia.edu/nagios/cgi-bin/extinfo.cgi?type=4" class="perfItem">Host Check Execution Time:</a></td><td class="perfValue" nowrap valign="top"><a href="https://nagios.cc.columbia.edu/nagios/cgi-bin/extinfo.cgi?type=4" class="perfValue">0.01 / 30.01 / 0.583 sec</a></td> </tr> <tr> <td class="perfItem" align="left" valign="center"><a href="https://nagios.cc.columbia.edu/nagios/cgi-bin/extinfo.cgi?type=4" class="perfItem">Host Check Latency:</a></td><td class="perfValue" nowrap valign="top"><a href="https://nagios.cc.columbia.edu/nagios/cgi-bin/extinfo.cgi?type=4" class="perfValue">0.00 / 712.08 / 1.051 sec</a></td> </tr></tbody></table> I have ndoUtils running in the background with long retention time. I have no performance issue. I had seen some issue in the past but that had to do with configuration issue. Please read the performance tuning section of the Nagios doc. Thanks <div class="gmail_quote">On Tue, Dec 1, 2009 at 10:14 AM, Tommy Mogensen <<a href="mailto:tommy.mogensen@uni-c.dk">tommy.mogensen@uni-c.dk</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi Nagios-experts I am looking for a free system able to monitor 3000-5000 hosts (Mainly cisco routers, switches and ap's) via ping and snmp. I would prefer to run everything on one server if possible. I have received a good deal on a machine with 16G ram, 2xSSD-disks (maybe in raid-0), and 2xIntel E5520-CPUs. I would appreciate your input regarding the performance issues should I use Nagios for this system. Is this configuration powerful enough, what are the limiting parts of the setup and are some of the pieces unnecessary? I.e. I could go for one cpu (4 cores) if nagios does not support threading to 8 cores....or is the main bottleneck that I do not run it distributed? Regards, Tommy ------------------------------------------------------------------------------ Join us December 9, 2009 for the Red Hat Virtual Experience, a free event focused on virtualization and cloud computing. Attend in-depth sessions from your desk. Your couch. Anywhere. <a href="http://p.sf.net/sfu/redhat-sfdev2dev" target="_blank">http://p.sf.net/sfu/redhat-sfdev2dev</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> -- Cordially, Shadhin Rahman