<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <TITLE>Message</TITLE> <META content="MSHTML 6.00.2800.1400" name=GENERATOR></HEAD> <BODY> <DIV>I currently monitor about 200 hosts and 700 services. However, in the past I have monitored 500 hosts and 2500 services with no issues on a PIII 866Mhz box.</DIV> <DIV> </DIV> <DIV>Changing the number of simultaneous checks as suggested by Nagios is a good start. However, there are several other parameters that you may want to look at, as described in these docs: <A href="http://nagios.sourceforge.net/docs/1_0/checkscheduling.html">http://nagios.sourceforge.net/docs/1_0/checkscheduling.html</A></DIV> <DIV>There is probably additional information relevant to your issue in the docs and/or FAQ, do a little digging.</DIV> <DIV> </DIV> <DIV>You may also want to look into distributed monitoring. </DIV> <DIV> </DIV> <DIV>When responding, please email the list, and not only to me. I don't have all the answers and there are people out there with more knowledge than I that may be able to offer further assistance. Also, it's a good idea to have these threads in the archives, so that maybe it will help someone else in the future.</DIV> Garry W. Cook, CCNA Network Infrastructure Manager MACTEC, Inc. - <A href="http://www.mactec.com/">http://www.mactec.com/</A> 303.308.6228 (Office) - 720.220.1862 (Mobile) <BLOCKQUOTE dir=ltr style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"> <DIV></DIV> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>-----Original Message----- From: marino.simons@acerta.be [mailto:marino.simons@acerta.be] Sent: Wednesday, May 26, 2004 1:47 AM To: Cook, Garry Subject: Betr.: RE: [Nagios-users] High check latency with nagios </DIV> Hi, Thanks for your advice, but I've already tried this, nagios suggests 560 simultanous checks, I changed this value in nagios.cfg, but it doesn't make any difference... For some reason the entire system bogs down. Anyway I am planning to remove 80% of the hosts from nagios, and then I hope to see some improvement.. Just to have an idea about the size of my nagios setup, how many hosts/services do you monitor with nagios? Thanks&regards, Marino Simons Acerta ICT, Network Administrator Tel: 016246776 <TABLE width="100%"> <TBODY> <TR vAlign=top> <TD> <TD>"Cook, Garry" <GWCOOK@mactec.com> 24/05/2004 22:12 <TD> Aan: <marino.simons@acerta.be> cc: Onderwerp: RE: [Nagios-users] High check latency with nagios</TR></TBODY></TABLE> Run Nagios with the help parameter '-h'. This will give you a description of a few other parameters that can be run. I think the one you will be interested in is '-s', which analyzes your check scheduling information and makes suggestions for improvement. You'll probably need to run the command like so: /path/to/nagios/bin/nagios -s /path/to/nagios/etc/nagios.cfg HTH Garry W. Cook, CCNA Network Infrastructure Manager MACTEC, Inc. - <A href="http://www.mactec.com/">http://www.mactec.com/</A> 303.308.6228 (Office) - 720.220.1862 (Mobile) -----Original Message----- From: nagios-users-admin@lists.sourceforge.net [mailto:nagios-users-admin@lists.sourceforge.net] On Behalf Of marino.simons@acerta.be Sent: Monday, May 24, 2004 12:59 AM To: nagios-users@lists.sourceforge.net Subject: [Nagios-users] High check latency with nagios Hi All, We are setting up nagios to monitor our infrastructure, and we ran into a few problems. Most of them I"ve been able to solve, thanks to reading the mailinglist. But the latest problem is a persistent one. I'm running nagios on Suse Enterprise server 9, with kernel 2.6.5 on a dual 2.4 ghz intel Xeon server with hyperthreading enabled, the system has 2GB ram. We recompiled the kernel with SMP-support, en it detects 4 cpu's.. In nagios we defined 405 servers, and we do 6855 active checks, and 17 passive checks. And we have an extremely bad performance. At the tactical overview I see the following information: check latency: 4468.402 sec. It takes nagios about 1,5 hour to see a status change. Needless to say that this is not acceptable. Anyway I am looking for some hints, does anybode have an idea on what causes this behavior? Thanks in advance!! Marino </BLOCKQUOTE></BODY></HTML>