<div>Hi List,</div> <div> </div> <div>First I think this is more appropiate fpr the Developer list so I hope Ethan has been watching this thread.</div> <div> </div> <div>If your observation is true,</div> <div>should Nagios have an internal default hostcheck command or some code to deactivate hostchecks when no hostcheck command is entered?</div> <div> </div> <div>Tony (author of NC_Net) </div> <div>On 9/10/07, SCHAER Frederic <<a href="mailto:frederic.schaer@cea.fr">frederic.schaer@cea.fr</a>> wrote: <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> <div lang="FR" vlink="purple" link="blue"> <div> I finally found a solution : either deactivate the host checks or… define a check_command for the hosts : with host_checks_enabled and without a check command, nagios eats all of my CPU, with a command defined, everything is back to normal… I wish I saw I had no check_command defined in my host template ! Cheers <div style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0cm; BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: blue 1.5pt solid; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"> <div> <div style="TEXT-ALIGN: center" align="center"> <hr align="center" width="100%" size="2"> </div> From: SCHAER Frederic Sent: Monday, September 10, 2007 5:56 PM To: SCHAER Frederic; <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:nagios-users@lists.sourceforge.net" target="_blank"> nagios-users@lists.sourceforge.net</a> Subject: RE: [Nagios-users] nagios 3.0b3 abnormal cpu load ?</div> <div> /me again… It seems there is a problem with host checks on my box that causes host checks to be run continuously on the same host(s) – well it seems that there is indeed no host check run because one is « always » executing ( ? no, it's not ! ). logs show this for a debug run of just a few seconds : # grep "A check of this host is already being executed" /var/log/nagios/nagios.debug | wc -l 1709 de-activating host checks (execute_host_checks=0)in the nagios.cfg file frees the CPU, at the cost of host checks… it's good to know, isn't it ? ;) Is this really usefull anyway if I define a check_ping service on all hosts ? Cheers <div style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0cm; BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: blue 1.5pt solid; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"> <div> <div style="TEXT-ALIGN: center" align="center"> <hr align="center" width="100%" size="2"> </div> From: <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:nagios-users-bounces@lists.sourceforge.net" target="_blank"> nagios-users-bounces@lists.sourceforge.net</a> [mailto:<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:nagios-users-bounces@lists.sourceforge.net" target="_blank">nagios-users-bounces@lists.sourceforge.net </a>] On Behalf Of SCHAER Frederic Sent: Monday, September 10, 2007 12:25 PM To: <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:nagios-users@lists.sourceforge.net" target="_blank">nagios-users@lists.sourceforge.net</a> Subject: Re: [Nagios-users] nagios 3.0b3 abnormal cpu load ?</div> Hi again, There is a difference between the nagios I compiled on the 2.4 kernel / RHEL3 box on the one hand, and the 2.6 one on Ubuntu on the other hand : when stracing the nagios process, I can see it's calling the nanosleep() function – and it then sleeps -, whereas on the 2.4 box I can't see such a call : I just see this kind of thing (and lots of these) : gettimeofday({1189419621, 161574}, NULL) = 0 time([1189419621]) = 1189419621 time([1189419621]) = 1189419621 gettimeofday({1189419621, 183742}, NULL) = 0 gettimeofday({1189419621, 183780}, NULL) = 0 gettimeofday({1189419621, 183814}, NULL) = 0 time([1189419621]) = 1189419621 gettimeofday({1189419621, 184172}, NULL) = 0 gettimeofday({1189419621, 184326}, NULL) = 0 time([1189419621]) = 1189419621 time([1189419621]) = 1189419621 gettimeofday({1189419621, 184734}, NULL) = 0 gettimeofday({1189419621, 184861}, NULL) = 0 gettimeofday({1189419621, 184984}, NULL) = 0 time([1189419621]) = 1189419621 gettimeofday({1189419621, 185537}, NULL) = 0 gettimeofday({1189419621, 185734}, NULL) = 0 Bad thing is that I tried to configure with and without the –enable-nanosleep or –disable-nanosleep switches, but this apparently has no effect :'(. So it seems nagios is sleeping all the time, eating the CPU… I'm still trying to see if I can find a way to compile with a "working sleep". Fred <div style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0cm; BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: blue 1.5pt solid; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"> <div> <div style="TEXT-ALIGN: center" align="center"> <hr align="center" width="100%" size="2"> </div> From: <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:nagios-users-bounces@lists.sourceforge.net" target="_blank"> nagios-users-bounces@lists.sourceforge.net</a> [mailto:<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:nagios-users-bounces@lists.sourceforge.net" target="_blank">nagios-users-bounces@lists.sourceforge.net </a>] On Behalf Of SCHAER Frederic Sent: Friday, September 07, 2007 5:51 PM To: <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:nagios-users@lists.sourceforge.net" target="_blank">nagios-users@lists.sourceforge.net</a> Subject: [Nagios-users] nagios 3.0b3 abnormal cpu load ?</div> Hi, I'm trying to setup a nagios 3.0b3 server, and I configured it with only one host, one check (ping). I can successfully start nagios, but I have concerns about the server cpu load : that's around 99% cpu usage all the time, on a P4 3GHz machine… Is there something I could do to decrese this load ? I tried installing a nagios 2.9 server using the same configuration, and the load caused by nagios is just … 0. I guess this is a bug in the beta 3 ? Increasing the sleep time in nagios.cfg does not help at all even if I put sleep_time=2500 (2500 seconds !) Any suggestions would be welcome J P.S : I compiled nagios on a 2.4.21 linux kernel, using gcc 3.2.3, don't know if this could help. I don't see many usefull things with maximum debug verbosity… </div></div></div></div></div></div> ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/" target="_blank"> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/</a> _______________________________________________ Nagios-users mailing list <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:Nagios-users@lists.sourceforge.net"> Nagios-users@lists.sourceforge.net</a> <a onclick="return top.js.OpenExtLink(window,event,this)" 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>