<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Are you running active host checks? You might try turning off host checks altogether as an experiment to see if scaling improves. 1000 hosts and 11,000 services is large. Regards, - Harper Andrew Tjang wrote: <blockquote cite="mid57B8C921BBE8FF4982FA726D39BC60EF01CA5A32@SITE2MAIL01.jeeves.ask.info" type="cite"> <pre wrap="">Hello everyone, I think we are facing a scalability issue in nagios. We are currently monitoring appx 11000 services (spread out over a thousand or so hosts. (give or take) Everything is done in passive checks, so no active checks are done. We have a cron job that runs to feed the nagios.cmd file with external service checks. This is a nightmare, as nagios does not finish processing all of the passive service checks before the next set of service checks comes in. This leads to the forking of many nagios instances that never finish. In an attempt to fix this situation, we have broken up monitoring into smaller chunks, each with it's own nagios daemon (all integrated into one gui). We have managed to make sure the above mentioned fork bomb effect does not occur. We have divided the logical partitions into groups of 1000, 3000, and 4000. The multiple groups of 1000 run fine with the cron job feeding service checks at a frequency of 1 batch per 5 minutes. However, with the 3K/4K instances, we must set the frequency to greater than 15 minutes to avoid the fork bombing problem. My questions are these: 1) is this scalability problem normal? 2) is there a way to fix this scalability problem? 3) is there anything we can do to increase the frequency of the checks? - one idea is to spread the actual service checks out to give nagios time to process them (rather than 1K at a time, perhaps give a few hundred, sleep a bit, and then give a few more, etc. Thanks in advance for all your input. -Andrew ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. <a class="moz-txt-link-freetext" href="http://sourceforge.net/powerbar/db2/">http://sourceforge.net/powerbar/db2/</a> _______________________________________________ Nagios-users mailing list <a class="moz-txt-link-abbreviated" href="mailto:Nagios-users@lists.sourceforge.net">Nagios-users@lists.sourceforge.net</a> <a class="moz-txt-link-freetext" href="https://lists.sourceforge.net/lists/listinfo/nagios-users">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 </pre> </blockquote> </body> </html>