<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style> </head> <body lang=FR link=blue vlink=blue> <div class=Section1> Hi,<o:p></o:p> <o:p> </o:p> I agree with you, I reported the problem on the developers’ list yesterday evening J<o:p></o:p> <o:p> </o:p> I think that there may just be a test missing somewhere in the code : host checks should be done on hosts if activated in the nagios.cfg file, but only if a host check command is defined for these hosts… concerning your question, for now I’m wondering what’s the difference between a host check and a (ping or whatever) service check : for this I think I have to go deeper in the famous ‘rtfm’ ;)<o:p></o:p> <o:p> </o:p> Cheers<o:p></o:p> <o:p> </o:p> <div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: nagios-users-bounces@lists.sourceforge.net [mailto:nagios-users-bounces@lists.sourceforge.net] On Behalf Of Anthony Montibello Sent: Monday, September 10, 2007 6:45 PM To: <st1:PersonName w:st="on">nagios-users@lists.sourceforge.net</st1:PersonName> Subject: Re: [Nagios-users] nagios 3.0b3 abnormal cpu load ?<o:p></o:p> </div> <o:p> </o:p> <div> Hi List,<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> First I think this is more appropiate fpr the Developer list so I hope Ethan has been watching this thread.<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> If your observation is true,<o:p></o:p> </div> <div> should Nagios have an internal default hostcheck command or some code to deactivate hostchecks when no hostcheck command is entered?<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> Tony (author of NC_Net) <o:p></o:p> </div> <div> On 9/10/07, SCHAER Frederic <<a href="mailto:frederic.schaer@cea.fr">frederic.schaer@cea.fr</a>> wrote: <o:p></o:p> <div vlink=purple link=blue> <div> I finally found a solution :<o:p></o:p> 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… <o:p></o:p> <o:p></o:p> I wish I saw I had no check_command defined in my host template !<o:p></o:p> <o:p></o:p> Cheers<o:p></o:p> <o:p></o:p> <div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center> </div> From: SCHAER Frederic Sent: Monday, September 10, 2007 5:56 PM To: SCHAER Frederic; <a 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 ?<o:p></o:p> </div> <div> <o:p></o:p> /me again…<o:p></o:p> <o:p></o:p> 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 ! ). <o:p></o:p> <o:p></o:p> logs show this for a debug run of just a few seconds :<o:p></o:p> # grep "A check of this host is already being executed" /var/log/nagios/nagios.debug | wc -l <o:p></o:p> 1709<o:p></o:p> <o:p></o:p> 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 ? ;) <o:p></o:p> Is this really usefull anyway if I define a check_ping service on all hosts ?<o:p></o:p> <o:p></o:p> Cheers<o:p></o:p> <o:p></o:p> <div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center> </div> From: <a href="mailto:nagios-users-bounces@lists.sourceforge.net" target="_blank">nagios-users-bounces@lists.sourceforge.net</a> [mailto:<a 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 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 ?<o:p></o:p> </div> <o:p></o:p> Hi again,<o:p></o:p> <o:p></o:p> 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 :<o:p></o:p> 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) :<o:p></o:p> <o:p></o:p> gettimeofday({1189419621, 161574}, NULL) = 0<o:p></o:p> time([1189419621]) = 1189419621<o:p></o:p> time([1189419621]) = 1189419621<o:p></o:p> gettimeofday({1189419621, 183742}, NULL) = 0<o:p></o:p> gettimeofday({1189419621, 183780}, NULL) = 0<o:p></o:p> gettimeofday({1189419621, 183814}, NULL) = 0<o:p></o:p> time([1189419621]) = 1189419621<o:p></o:p> gettimeofday({1189419621, 184172}, NULL) = 0<o:p></o:p> gettimeofday({1189419621, 184326}, NULL) = 0<o:p></o:p> time([1189419621]) = 1189419621<o:p></o:p> time([1189419621]) = 1189419621<o:p></o:p> gettimeofday({1189419621, 184734}, NULL) = 0<o:p></o:p> gettimeofday({1189419621, 184861}, NULL) = 0<o:p></o:p> gettimeofday({1189419621, 184984}, NULL) = 0<o:p></o:p> time([1189419621]) = 1189419621<o:p></o:p> gettimeofday({1189419621, 185537}, NULL) = 0<o:p></o:p> gettimeofday({1189419621, 185734}, NULL) = 0<o:p></o:p> <o:p></o:p> Bad thing is that I tried to configure with and without the –enable-nanosleep or –disable-nanosleep switches, but this apparently has no effect :'(. <o:p></o:p> 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". <o:p></o:p> <o:p></o:p> Fred<o:p></o:p> <o:p></o:p> <o:p></o:p> <div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center> </div> From: <a href="mailto:nagios-users-bounces@lists.sourceforge.net" target="_blank">nagios-users-bounces@lists.sourceforge.net</a> [mailto:<a 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 href="mailto:nagios-users@lists.sourceforge.net" target="_blank">nagios-users@lists.sourceforge.net</a> Subject: [Nagios-users] nagios 3.0b3 abnormal cpu load ?<o:p></o:p> </div> <o:p></o:p> Hi,<o:p></o:p> <o:p></o:p> I'm trying to setup a nagios 3.0b3 server, and I configured it with only one host, one check (ping).<o:p></o:p> 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… <o:p></o:p> <o:p></o:p> 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. <o:p></o:p> I guess this is a bug in the beta 3 ?<o:p></o:p> <o:p></o:p> Increasing the sleep time in nagios.cfg does not help at all even if I put sleep_time=2500 (2500 seconds !)<o:p></o:p> <o:p></o:p> Any suggestions would be welcome J<o:p></o:p> <o:p></o:p> 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… <o:p></o:p> <o:p></o:p> <o:p></o:p> </div> </div> </div> </div> </div> </div> ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. <a 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 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<o:p></o:p> </div> <o:p> </o:p> </div> </div> </body> </html>